| short press again restores. When light on, this |
| key stays white-lit; its backlight goes off with the light. |
| Bluetooth Key: | Short press: BT on/off; long press 1s: play/pause; long press 5s: disconnect; hold 10s: force BT reset. Key backlight |
| is off when BT off, blue when BT on. |
| Clock/Set key: | short press toggles time/year display. Long press enters setting mode; short press switches items; long |
| press selects the item (flashing) and adjusts via +/- keys; long press saves and exits. White when not powered off. |
| Decrease Key: | In clock setting: short/long press decreases the value. In BT mode: short press previous track, long press volume down. When |
| not powered off, this |
| key stays white-lit. |
| Next Track Key: | In clock setting: short/long press increases the value. In BT mode: short press next track, long press volume up. When not |
| powered off, this |
| key stays white-lit. |
| RGB Key: | Short press: RGB on/off + effect switch; long press: dimming. If idle 5s, short press turns RGB off; short press again restores. When RGB off, long press |
| powers the unit off; short press powers it on. BT defaults off at boot; power-off clears all other key backlights, display |
| and BT. This key is white when on, dark when off. |
