eForcity Mini Wireless Bluetooth Headset - Black Stay connected while staying hands-free, even when texting, with this mini wireless Bluetooth headset. Freedom to exercise, move around and commute without wires to tangle or hold you back. Features. Function button for: Answering, ending, on, off. LED indicator light. Receiver / speaker. Microphone. Ear hook. Volume button. Specifications. Standard Convention / Signal Output: Bluetooth V2. 0, Class II. Frequency Band: 2. 4GHz - 2. 4835GHz, ISM Band. Talk Time: 3 hours. Standby Time: 70 hours. Power Capacity: Rechargeable Li-Polymer. Power Supply: 5V DC. Size: 50 x 18 x 22 mm. Compatible with Samsung ; Galaxy S IV / S4