Mini BT Speaker Bone Conduction Portable 6 Hours Playing Time Stereo Speaker Specification: Specifications: BT version: BT5.0 Audio format: MP3, AC3, AAC, WAV... Output power: 3W Frequency response: 120Hz-16kHz SNR: Greater than or equal to 70dB Power supply: 400mAh batterys, Type c DC5V/0.4A Material: aluminum alloy Package List:Package1: 1xBT speaker 1xLanyard 1xSuction cup 1xAdhensive 1xType-c cable Package2: 2xBT speaker 2xLanyard 2xSuction cup 2xAdhensive 2xType-c cableor 1 x BT speaker 1 x Lanyard 1 x Suction cup 1 x Adhensive 1 x Type c cable or Package1: 1xBT speaker 1xLanyard 1xSuction cup 1xAdhensive 1xType-c cable Package2: 2xBT speaker 2xLanyard 2xSuction cup 2xAdhensive 2xType-c cable or 2 x BT speaker 2 x Lanyard 2 x Suction cup 2 x Adhensive 2 x Type c cable Bone conduction speaker, a DIY sound experience, place it on different surfaces such as plastics storage box, glass, wooden desk can provide you various sound effects Features advanced BT 5.0 chip supporting BT connection and;-enabled Quality sound effect, up to 115db powerful;sound volume, full bass and loud treble Built-in 400mAh lithium battery, up to 6 hours playing time after 1 hour fully charged Mini and compact size, convenient to carry and perfect decoration