Features: Quality sound effect, up to 115db powerful sound volume, full bass and loud treble. Bone conduction speaker, a DIY sound experience, place it on different surfaces such as plastics storage box, , wooden desk can provide you various sound effects. Features advanced BT 5.0 chip supporting BT connection and TWS-enabled. Mini and compact size, convenient to carry and perfect decoration. Built-in 400mAh lithium battery, up to 6 hours playing time after 1 hour fully charged. 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 movies. Specifications: Material: aluminum alloy Color: Silver/Red/Black Qty: 1 pack/ 2 pack BT version: BT5.0 Audio format: MP3, AC3, AAC, WAV... Output power: 3W Frequency response: 20-20kHz SNR: ≥70dB Power-supply: 400mAh lithium batteries, Type-c charge DC5V/0.4A Package size: 707050mm/2.762.761.97in(1 pack) Package weight: 85g/3oz(1 pack) Packing List: 1BT speaker 1Lanyard 1Suction Cup 1Adhesive 1Type-c charge cable 3 Magnetic Fixing Piece.