Mini Wireless Bluetooth Earphone Earhook Stereo Music Headset Noise Cancellation with Micro for iPhone Xiaomi Samsung

Bluetooth version: bluetooth 4.1
Bluetooth distance: without obstacles 10 meters
Resistance: 32 ohms + -15%
Sensitivity: 103 + 3db
Frequency response range: 50-10 kHz
Microphone sensitivity: -42 + -3db
Microphone resistance: 2.2 K ohms
Waiting time: about 160 hours
Talk time: about 6 hours
Music time: around 5 hours
Charging time: about 1.5 hours