Model No: GVB-601 Main functions features Technology Standard: Bluetooth V2.0 Chipset: BlueCore4-Audio Single Chip Compatibility: General Headset and Bluetooth Cell Phone Radio Performance: Class 2 Carrier Frequency: 2.4-2.480GHz Rx Sensitivity: -75dBm Spread Spectrum: 10 metersPower Charger: Input 100-240VAC, Output 5VDC Working Volt: 3.7V Battery: Rechargeable Li-polymer Inside Charging Time: 2-5hs Talking Time: 8hs Standby: 240hs Appearance Package Size: 145*114*50mm Headset Size:58*27*18mm Headset Weight: 17g Packing Quantity: 50 PCS/box
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