Bone conduction speaker, a DIY sound experience, place it on different surfaces such as plastics storage box, glass, wooden desk can provide you sound effects. Features advanced BT 5.0 chip supporting BT connection and TWS-enabled. Quality sound effect, up to 115db powerful sound volume, full bass and loud treble. Built-in 400mAh lithium battery, 240hours batterys standby time. Mini and compact size, convenient to carry and perfect decoration. Used as FM radio allows you to listen to music, have phone conversations or conference calls, and even enjoy an fine sound experience of your playing games, videos or . BT version: BT5.0 Audio format: MP3, AC3, AAC, WAV... Output power: 3W Frequency response: 20-20kHz : 70dB Power-supply: 400mAh lithium batterys, Type-c DC5V/0.4A color:Black Material:plastic Package Contents: 1 x BT speaker 1 x Lanyard 3 x Suction cup 3 x Stickers 1 x Type-c cable 1 x Soundboard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.