Mini Wireless Bluetooth Noise Sleep Speaker Under Pillow High Tech Sound Disc Portable Rechargeable Gift for Insomnia Relaxation

Voltage range : USB (5-20V DC) High-concerned chemical : None Input/Output : USB Sound Mode : Sleeping Mode Category : Speakers Use : Home Input Power(W) : <25 W Voice Control : No Waterproof : No Support APP : No Inbox adaptor : No Intelligent Personal Assistant : None Audio Crossover : Full-Range Number of Loudspeaker Enclosure : 1 Power Source : USB Channels : 1 Battery : Yes Communication : WireLess Speaker Type : Portable Cabinet Material : Plastic Power Source : USB Origin : Mainland China Power supply method : TYPE-C frequency response ran : 60Hz-15KHz Built in battery capacity : 300mAh-500mAh (Including) connection method : Bluetooth connection Additional features : 360 ° surround sound effect Is there a built-in battery : Built-in battery Box material : ABS waterproof rating : Not waterproof effective distance : 10 signal-to-noise ratio : ≥100dB