DENVER BTL-324 Bluetooth speaker Features: 2 x 5W RMS output Bluetooth 5.0 MicroSD card reader for MP3 playback USB input for MP3 playback LED light show Operating range up to 15 meters 3.5mm AUX in Handsfree calling Built-in rechargeable battery 1200 mAh. Playtime: 3-4 hours per charge Specifications: Highlights Bluetooth, AUX input, Light effects, USB & SD card slot Power Built-in rechargeable battery Battery 1200mAh lithium battery Connections Bluetooth, AUX input, USB & SD card slot Volume 2 x 5W RMS