Electro Rumble

Power Control

Long press for “on/off”. When playing music (USB card/TF card/FM/BT), short press to switch between USB/TF/FM/BT modes.

Playback & Call Controls

When playing music (USB card/TF card/BT):

• Short press for “play/pause” in BT mode (with paired mobile)
• During calls: short press to answer, press again to hang up
• In FM mode: short press to auto-search stations, press again to stop

For TWS mode: Keep speakers in BT mode without pairing, press “play/pause” for 4 seconds until you hear a prompt and the light stops flashing. Then pair with mobile.

Volume & Track Controls

When playing music:

• Short press for previous song, long press to decrease volume
• Short press for next song, long press to increase volume