These Bluetooth headphones provide superior sound quality and crystal-clear reception from up to 33' away from an audio source without being tethered to a cord. Unlike lesser models with weak reception, these headphones can receive a clear wireless signal through walls and ceilings. The headphones produce rich, full sound with deep bass and crisp high notes, while soft ear cushions, an adjustable headband, and a telescoping voice tube with omni-directional microphone make them comfortable to wear and use. The headphones chime to signal an incoming call and switch seamlessly from music listening to cell phone use. Connects to non-Bluetooth devices with a 3.5 mm jack ensuring compatibility with iPods, CD players, and more. The rechargeable battery provides up to 12 hours of talk time and 130 hours of standby time after a two-hour charge, and the headphones and adapter recharge via AC or USB (adapters included). Includes travel case and a desktop charging stand. Cell phones must be Bluetooth capable. (3 1/2 oz.)