Bluetooth Mono Headset

Chipset: ISSC, Bluetooth: V4.1+EDR, Frequency Range: 2.4-2.48GHz, Range: 10m, Talk Time: 4hrs, Standby Time: 100hrs, Charging Time: 2hrs, Weight: 6.8g, Size: 50.5*14.8*8.0mm, Charging Plug: Micro USB 5V

Chipset: ISSC2008, Bluetooth: V4.1+EDR, Frequency Range: 2.4-2.48GHz, Range: 10m, Talk Time: 2hrs, Standby Time: 100hrs, Charging Time: 2hrs, Weight: 7g, Size: 51.5*15.8*8.36mm, Charging Plug: Micro USB 5V

Bluetooth version : V4.2+EDR ,Earphone battery: Polymer lithium battery 45mA ,User hours: 2 hours (up to) ,Standby Time: 96H ,Transmission Distance:10 M ,Earphones Charging Time: <2 hours,Sensitivity: -42db ,Impedance: 32Ω ,Frequency response: 20-20KHz, Fits in the right ear