Features: Bone conduction speaker, DIY sound experience, place it on different surfaces such as plastic box, glass, wooden desk, can provide different sound effects. It includes an advanced BT 5.0 chip that supports BT connection and True Wireless Stereo support. High-quality sound effect, powerful sound volume up to 115 db, full bass and loud treble. Built-in 400mAh lithium battery, up to 6 hours of playback after 1 hour of full charge. Mini and compact size, convenient to carry and perfect decoration. Used as an FM radio , it allows you to listen to music , make phone calls or conference calls, and even enjoy great sound while playing games, movies, or movies. technical date: BT version: BT5.0 Audio format: MP3, AC3, AAC, WAV... Output Power: 3 W Frequency Response: 20-20 kHz SNR: ≥70dB Power supply: 400 mAh lithium batteries, type c charging DC5V/0.4A Material: aluminum alloy; Black color List of things to pack: 1 * BT speaker 1 * leash 1 * suction cup 1 * Adhesive 1 * Type-C charging cable