Bone Conduction Bluetooth SpeakerTurn surfaces into sound with this compact silver bone conduction Bluetooth speaker. Using vibration audio technology, it transforms hollow surfaces like tables, boxes and dashboards into unique sound amplifiers for portable music, calls and FM radio.Features Bone conduction speaker turns hollow surfaces into audio amplifiers Bluetooth 5.0 wireless connection 3W bone conduction transducer Supports FM radio, music playback and hands-free calls Stereo pairing support for 2.0 channel sound Compact aluminium alloy body 400mAh rechargeable polymer battery Best used on flat or hollow surfaces for improved sound projection Specifications Material: Aluminium alloy Wireless Version: Bluetooth 5.0 Output Power: 3W bone conduction transducer Frequency Range: 120Hz-16kHz Battery Capacity: 400mAh polymer battery Functions: Bone conduction audio, FM radio and stereo pairing Size: 40mm x 40mm x 24mm Weight: 35g Colour: Silver Package Contents1 x Bone Conduction Bluetooth Speaker