Speakers - Universal - 10W Bluetooth Speaker with Mobile Power, Bluetooth 5.0, 24-Hour Playback (Gray) Highlights Universal 10W Bluetooth Speaker with Mobile Power, Bluetooth 5.0, 24-Hour Playback (Grey) ) 10W Bluetooth Speaker with Mobile Power, Bluetooth 5.0, 24-Hour Playback (Gray) Product is shipped based on the color or size of the main product page image. Multi-function height for driving: Bluetooth 5.0, built-in microphone, hands-free calling, TF card playback, portable charging station, essential accessories for driving./ Bottom). advance to ensure the safety of driving at night. Dark and Powerful Sound: A neodymium stereo amplifier with a 40mm large driver gives you a realistic and clear experience during incredible calls and excesses. The excellent sound resolution makes the S1 beautiful doorbell above average . Durable Battery: 4000mAh Rechargeable Battery provides long-term use and good support for emergency power. The portable wireless speaker is very suitable for cycling, camping, traveling, beach, biking, riding and other outdoor activities.