Sony DRBT50 Stereo Bluetooth Headset (Discontinued by Manufacturer) 40mm headphone driver units with Neodymium magnets Auranomic design on the earpiece from w/in the earpiece Stand by time approx 200 hours Rechargeable function Remote control within the earpiece 40mm headphone driver units with neodymium magnets Auranomic design on the earpiece Standby time of approximately 200 hours Rechargeable function Remote control within the earpiece