A:Bluedio I4 Bluetooth headset binaural stereo latest upgraded version 4.1 of Apple 5S one with two universal

The latest version of Bluetooth V4.1 Genuine Bluedio I4 Stereo Bluetooth headset universal support phone calls， listen to music， up and down the selections， pause / play， volume addition and subtraction.

Bluetooth headset pairing method: Keep pressing the power button for 6 seconds to see the lights flash also has been pressed， the long bright blue light does not flash before they can let go， you can use the phone search， matching， connection.

Bluetooth version: V4.1， compatible with V4.0 V3.0 V2.1 V2.0

Wireless Frequency: 2.4-2.48GHz
Transmission power: Class2
Transmission distance: up to 10 meters (depending on the specific phone， the environment and the transmission distance is different)
Talk time: 6 hours

Music time: 6 hours
Standby time: 120 hours
Charging time: 2 hours
Battery type: 130mAh lithium polymer battery
Available colors: Black White

Headset weight: 10g

Dimensions: 50x 18 X10MM

B:Bluedio / blue string I6 lapel CND Bluetooth headset 4.1 Universal Stereo Wireless Headset