Promate Wireless Bluetooth Keyboard with Phone Handset – features a 3.5mm jack handset, single press expandable keyboard design, durable ABS plastic housing, Bluetooth 2.1 connectivity, rechargeable 300mAh Li-polymer battery with 60 hours working time, 2-hour charging, standby and sleep modes for power saving, and up to 10m transmission range, 1-year warranty.