Model Number: WY-081-04 Brand Name: WANYI Key Specifications/Special Features: 1. LED colorful lights2. Wide range of applications3. The speaker is not max volume at the factory setting, keep pressing the VOL+ to increase the VOL, or increase your device VOL.3. The speaker will under Bluetooth mode automatically when turn on, press the power key to change the TF and AUX mode (Bluetooth-TF-AUX) Rated impedance4Ω Rated voltage DC 5V Power rating 3W Speaker diameter 52MM Material ABS Channels Mono Color Blue, pinkwhite, greenyellow and orange