Features/Specifications: 7636C Red *Bluetooth music playback. *TWS *Aux line function. *IPX5 waterproof Chipset IC: JL AC6965 Bluetooth version:5.4 Battery capacity :1500mah Frequency range: 100Hz-20kHz Material: ABS+fabric+Silicone Battery voltage:3.7-4.2V Working range : 10m Power rating :5W Rated impedance:3Ω Distortion:Less than 12% Power supply : USB 5V Working hour:3-4hrs Product size:80*80*180mm