Charging induction coil: upgrade 2 induction coils, which can wirelessly charge mobile phones in the horizontal and vertical directions BT andamp TF card playback: BT5.1 guarantees fast data transmission speed, stable connection and low power consumption. Also supports TF card music playback LED display and clock: with clock display and 2 alarm setting functions. LED digital display mode status, time, alarm, etc. Easy to operate: you can easily control the power on or off, pause or play, volume , previous or next song, etc. press the M key to easily change the audio source Long battery life: Built-in rechargeable 1200mAh battery, music playback time up to 4 hours rechargeable via Type-C port with charging cable Specification: Bluetooth version: V5.1 Bluetooth distance: 10m (barrier-free) TF card: maximum support 32GB (not included) Speaker specifications: φ45mm X1, 4Ω, 5W Passive diaphragm: φ40mm X1 Playing time: about 4 hours (depending on the volume) Charging time: about 3 hours Battery capacity: 3.7V or 1200mAh lithium battery USB interface output: DC5V 1A, 5W Wireless charger output power: 10W, 7.5W, 5W Product size: 16.2x12.0x10.0cm Product weight: 360g