Bluetooth technology is a low-power, low-cost wireless technology for short-range radio communication between electronic devices. (i.e., mobile phones, laptops, PDAs, stereo headsets, MP3 players, digital cameras, PC and computer peripherals). Bluetooth replaces peripheral cables. It is basically a wireless USB. This Miniblue BAE-800 Bluetooth Headset offers wireless freedom in the most discreet way. Comfortably designed to be worn in the ear for clear audio. A light weight li-poly battery is in the headset while an auxiliary longer lasting li-poly battery is in the charge cradle, and it can be charge simulanteously when the cradle is being charged. The charger cradle can be charge seperately while the headset is being used. The BlueAction Bluetooth hand-free headset BAE-800 is universally compatible with all Bluetooth enabled cell phones, PDA and other devices, including iPhone. The headset is latest Bluetooth? version 2.0 compiant with enhanced Data Rate (EDR) with DSP. BAE-800 is built with cho cancellation and noise reduction technology. Active sliding boom mic answers and end calls. Initiate Push-to-talk calls from the headset. Bluetooth Compliance: Bluetooth 2.0 with HFP and HSP:Frequency Range: 2.402 2.480GHz:Transmission Output Power: 0.25 2.5Mw; Maximum Cordless Distance: 10m; Typical Standby Time: Up to 200 hours; Typical Talking Time: Up to 8 hours; Battery Type: Rechargeable Lithium Ion; Charger Rated Input: AC 100-240V, 50/60Hz; Charger Rated Output: DC 5V, 500mA; Dimensions (L x W x H): 30 x 14 x 10mm; Weight: 7g