HyperGear MiniBoom Wireless Speaker Is Engineered To Deliver HD Stereo Sound & Precision Bass. Connect Any Bluetooth-enabled Device To Stream Music or Take Calls With The Hands-free Speaker (Silver) A Trusted American Brand. Portable Size, Colossal Sound: 45mm driver units within this speaker create a sound you simply wouldnt believe comes from such a small device. Long lasting: the MiniBoom Wireless Speaker can be turned on standby for up to 100 hours at a time, and will play music continuously for up to 3 hours with the built in rechargeable battery. Switch it up: the HyperGear MiniBoom Wireless Speaker can connect via Bluetooth to your favorite device. Walk or workout while youre listening: the MiniBoom Wireless Speaker is able to pick up your devices Bluetooth signal from up to 33 feet away.