i7s Dual Twins Bluetooth Earphone with Charger DOC

Driver: 15mm
Bluetooth version: Bluetooth v4.2 + EDR
Bluetooth use band: 2.4GHz
Power level: CLASS II
Output power: 30mW
Bluetooth distance: 7-10 meters barrier
Frequency response: 20-20000Hz
Operating voltage range: 3.0V-4.2V
Mic sensitivity: -42dB
With A2DP / AVRCP high quality stereo audio transmission and remote control protocol
(boot does not connect Bluetooth state, press the switch 2 times, hear the tone switch successfully)
Standby time is about 2-3 days

Package Includes:
2 x Bluetooth Headphones(left and right earphones)
1 x Charging box
1 x USB Charging Cable
1 x User Manual