diff --git a/client/public/version.js b/client/public/version.js
index 98bc303..71ed924 100644
--- a/client/public/version.js
+++ b/client/public/version.js
@@ -1,5 +1,5 @@
 // Maintainer-controlled web client version.
 // Format: YYYY.MM.DD Rn (example: 2026.02.20 R2)
-window.CHGRID_WEB_VERSION = "2026.02.21 R119";
+window.CHGRID_WEB_VERSION = "2026.02.21 R120";
 // Optional display timezone for timestamps. Falls back to America/Detroit if unset/invalid.
 window.CHGRID_TIME_ZONE = "America/Detroit";
diff --git a/client/src/items/itemRegistry.ts b/client/src/items/itemRegistry.ts
index 3de4ab3..9c7a7c3 100644
--- a/client/src/items/itemRegistry.ts
+++ b/client/src/items/itemRegistry.ts
@@ -48,7 +48,7 @@ const DEFAULT_CLOCK_TIME_ZONE_OPTIONS = [
 const DEFAULT_ITEM_TYPE_SEQUENCE: ItemType[] = ['clock', 'dice', 'radio_station', 'wheel'];
 
 const DEFAULT_ITEM_TYPE_EDITABLE_PROPERTIES: Record<ItemType, string[]> = {
-  radio_station: ['title', 'streamUrl', 'enabled', 'channel', 'volume', 'effect', 'effectValue', 'facing'],
+  radio_station: ['title', 'streamUrl', 'enabled', 'channel', 'volume', 'effect', 'effectValue', 'facing', 'emitRange'],
   dice: ['title', 'sides', 'number'],
   wheel: ['title', 'spaces'],
   clock: ['title', 'timeZone', 'use24Hour'],
@@ -131,6 +131,7 @@ export function itemTypeLabel(type: ItemType): string {
 
 export function itemPropertyLabel(key: string): string {
   if (key === 'use24Hour') return 'use 24 hour format';
+  if (key === 'emitRange') return 'emit range';
   return key;
 }
 
diff --git a/client/src/main.ts b/client/src/main.ts
index 1a0a69b..5c663b3 100644
--- a/client/src/main.ts
+++ b/client/src/main.ts
@@ -525,7 +525,9 @@ function itemLabel(item: WorldItem): string {
 
 function getItemSpatialConfig(item: WorldItem): { range: number; directional: boolean; facingDeg: number } {
   const global = getItemTypeGlobalProperties(item.type);
-  const rawRange = Number(global.emitRange);
+  const rawParamRange = Number(item.params.emitRange);
+  const rawGlobalRange = Number(global.emitRange);
+  const rawRange = Number.isFinite(rawParamRange) && rawParamRange > 0 ? rawParamRange : rawGlobalRange;
   const range = Number.isFinite(rawRange) && rawRange > 0 ? rawRange : 15;
   const directional = global.directional === true;
   const rawFacing = Number(item.params.facing ?? 0);
@@ -713,6 +715,11 @@ function getItemPropertyValue(item: WorldItem, key: string): string {
     if (!Number.isFinite(parsed)) return '0';
     return String(Math.round(normalizeDegrees(parsed) * 10) / 10);
   }
+  if (key === 'emitRange') {
+    const parsed = Number(item.params.emitRange ?? getItemTypeGlobalProperties(item.type)?.emitRange ?? 15);
+    if (!Number.isFinite(parsed)) return '15';
+    return String(Math.round(parsed));
+  }
   const globalValue = getItemTypeGlobalProperties(item.type)?.[key];
   if (globalValue !== undefined) return String(globalValue);
   return String(item.params[key] ?? '');
@@ -2008,6 +2015,14 @@ function handleItemPropertyEditModeInput(code: string, key: string, ctrlKey: boo
         return;
       }
       signaling.send({ type: 'item_update', itemId, params: { facing: Math.round(parsed * 10) / 10 } });
+    } else if (propertyKey === 'emitRange') {
+      const parsed = Number(value);
+      if (!Number.isInteger(parsed) || parsed < 5 || parsed > 20) {
+        updateStatus('emit range must be an integer between 5 and 20.');
+        audio.sfxUiCancel();
+        return;
+      }
+      signaling.send({ type: 'item_update', itemId, params: { emitRange: parsed } });
     } else if (propertyKey === 'spaces') {
       const spaces = value
         .split(',')
diff --git a/docs/item-schema.md b/docs/item-schema.md
index d0952b5..e604d43 100644
--- a/docs/item-schema.md
+++ b/docs/item-schema.md
@@ -25,7 +25,8 @@
 - `emitSound`: optional continuously-looping spatial sound emitted from the item on the grid; global item field and not user-editable in V1.
 - `capabilities`, `useSound`, and `emitSound` are derived from global item-type definitions at runtime (not stored per-instance in persisted state).
 - `useCooldownMs`: global per item type (`radio_station=1000`, `dice=1000`, `wheel=4000`, `clock=1000`), not per-instance editable.
-- `emitRange`: global spatial range per item type (`radio_station=20`, `dice=15`, `wheel=15`, `clock=10`), not per-instance editable.
+- `emitRange`: global spatial range default per item type (`radio_station=20`, `dice=15`, `wheel=15`, `clock=10`).
+  - `radio_station` can override this per instance via `params.emitRange` (`5..20`).
 - `directional`: global directional attenuation flag per item type (`radio_station=true`, others `false`), not per-instance editable.
 
 ## Persisted Item State (`server/runtime/items.json`)
@@ -64,7 +65,8 @@
   "volume": 50,
   "effect": "off",
   "effectValue": 50,
-  "facing": 0
+  "facing": 0,
+  "emitRange": 20
 }
 ```
 
@@ -76,6 +78,7 @@
 - `effect`: one of `reverb | echo | flanger | high_pass | low_pass | off`, default `off`.
 - `effectValue`: number, range `0-100`, precision `0.1`.
 - `facing`: number, range `0-360`, precision `0.1` (used when `directional=true`).
+- `emitRange`: integer, range `5-20`, default `20`.
 
 ### `dice`
 
diff --git a/docs/item-types.md b/docs/item-types.md
index a920c26..298b23d 100644
--- a/docs/item-types.md
+++ b/docs/item-types.md
@@ -26,6 +26,7 @@ This is behavior-focused documentation for item types and their defaults.
   - `effect="off"`
   - `effectValue=50`
   - `facing=0`
+  - `emitRange=20`
 - Global:
   - `useSound=none`
   - `emitSound=none`
@@ -42,6 +43,7 @@ This is behavior-focused documentation for item types and their defaults.
 - `effect`: `reverb | echo | flanger | high_pass | low_pass | off`
 - `effectValue`: number `0..100` with `0.1` precision
 - `facing`: number `0..360` with `0.1` precision
+- `emitRange`: integer `5..20`
 
 ## `dice`
 
diff --git a/server/app/item_catalog.py b/server/app/item_catalog.py
index b933bfb..a991ffb 100644
--- a/server/app/item_catalog.py
+++ b/server/app/item_catalog.py
@@ -16,7 +16,7 @@ ITEM_TYPE_LABELS: dict[ItemType, str] = {
 RADIO_EFFECT_OPTIONS: tuple[str, ...] = ("reverb", "echo", "flanger", "high_pass", "low_pass", "off")
 RADIO_CHANNEL_OPTIONS: tuple[str, ...] = ("stereo", "mono", "left", "right")
 ITEM_TYPE_EDITABLE_PROPERTIES: dict[ItemType, tuple[str, ...]] = {
-    "radio_station": ("title", "streamUrl", "enabled", "channel", "volume", "effect", "effectValue", "facing"),
+    "radio_station": ("title", "streamUrl", "enabled", "channel", "volume", "effect", "effectValue", "facing", "emitRange"),
     "dice": ("title", "sides", "number"),
     "wheel": ("title", "spaces"),
     "clock": ("title", "timeZone", "use24Hour"),
@@ -86,7 +86,16 @@ ITEM_DEFINITIONS: dict[ItemType, ItemDefinition] = {
         capabilities=("editable", "carryable", "deletable", "usable"),
         use_sound=None,
         emit_sound=None,
-        default_params={"streamUrl": "", "enabled": True, "channel": "stereo", "volume": 50, "effect": "off", "effectValue": 50, "facing": 0},
+        default_params={
+            "streamUrl": "",
+            "enabled": True,
+            "channel": "stereo",
+            "volume": 50,
+            "effect": "off",
+            "effectValue": 50,
+            "facing": 0,
+            "emitRange": 20,
+        },
         emit_range=20,
         directional=True,
     ),
diff --git a/server/app/item_type_handlers.py b/server/app/item_type_handlers.py
index 3e02817..06ad75f 100644
--- a/server/app/item_type_handlers.py
+++ b/server/app/item_type_handlers.py
@@ -112,6 +112,14 @@ def _validate_radio_update(item: WorldItem, next_params: dict) -> dict:
     if not (0 <= facing <= 360):
         raise ValueError("facing must be between 0 and 360.")
     next_params["facing"] = round(facing, 1)
+
+    try:
+        emit_range = int(next_params.get("emitRange", item.params.get("emitRange", 20)))
+    except (TypeError, ValueError) as exc:
+        raise ValueError("emitRange must be an integer between 5 and 20.") from exc
+    if not (5 <= emit_range <= 20):
+        raise ValueError("emitRange must be between 5 and 20.")
+    next_params["emitRange"] = emit_range
     return next_params
 
 
diff --git a/server/tests/test_item_use_cooldown.py b/server/tests/test_item_use_cooldown.py
index 56dbf9e..1d4b6a7 100644
--- a/server/tests/test_item_use_cooldown.py
+++ b/server/tests/test_item_use_cooldown.py
@@ -132,6 +132,20 @@ async def test_radio_channel_update_validates(monkeypatch: pytest.MonkeyPatch) -
     assert send_payloads[-1].ok is False
     assert "facing must be between 0 and 360" in send_payloads[-1].message.lower()
 
+    await server._handle_message(
+        client,
+        json.dumps({"type": "item_update", "itemId": item.id, "params": {"emitRange": 12}}),
+    )
+    assert send_payloads[-1].ok is True
+    assert item.params.get("emitRange") == 12
+
+    await server._handle_message(
+        client,
+        json.dumps({"type": "item_update", "itemId": item.id, "params": {"emitRange": 4}}),
+    )
+    assert send_payloads[-1].ok is False
+    assert "emitrange must be between 5 and 20" in send_payloads[-1].message.lower()
+
 
 @pytest.mark.asyncio
 async def test_clock_use_reports_time_without_use_sound_packet(monkeypatch: pytest.MonkeyPatch) -> None: