Product attributes Product dimensions: height 26 mm, diameter 40 mm, weight 35 g Main control chip: Bluetooth 5.0 supports TWS real stereo sound and FM radio Function chip: 20HZ~20KZ full range output Sound channel: dual channels, 2 independent bone conduction transducers Output power: 3W audio output Audio decoding: supports MP3/AC3/AAC/WAV, etc Bone conduction transducer: built-in enhanced magnetic core and high-performance coil Microphone: omnidirectional microphone, can talk FM radio: built-in FM enhanced IC, more than 10 conventional indoor radio receivers Charging interface: TYPE C interface, 5V0.4A charging current Built in battery: polymer lithium battery with capacity of 400mAh 3.7-4.2V welding wire Standby time: no less than 240 hours If it is used all the time, play it at 80% volume for 2-3 hours, and at maximum volume for 1-1.5 hours Package List: