Earphones X ZERO In-Ear Bluetooth

Speaker frequency: 20~20K Hz
Speaker sensitivity: 100dB + 3dB at 1KHz
Impedance: 32 Ohms±10%
Microphone sensitivity: -58+3dB
Microphone directionality: Multidirectional design
Microphone frequency response: 100-10000HZ
Bluetooth version 4.1
Transmission distance: approximately 5m
Bluetooth support: A2DP, AVRCP
Frequency range: 2.402~2.480GHz
Onboard 60MAH lithium-ion battery
Rated power: 15mW
Charging voltage: DC 5V
Charging time: approximately 2 hours
Music play time: approximately 2 hours
Call time: approximately 3 hours
Standby time: approximately 300 hours
cable length: 500mm+50mm
Accessories: USB cable 1pcs