Wireless Neckband Hands-free Stereo Bluetooth Headsets Headphones Earphones Earbuds with APTX for Smart Phones with Bluetooth 4.0 (Black Red)

Specifications:
Music Time: 10 Hours (Up To)
Talk Time: 12 Hours (Up To)
Standby Time: 20 Days (Up To)
Charging Time: 2 Hours
Changing Voltage: micro USB 5V (500mA)
Working Current: 10-20mA
Operational Range: 10m
Output Power: 2x18mW
Frequency Range: 2.401-2.480GHz
Distortion Factor: ≤1%
Frequency Response: 20Hz-20kHz
SNR: ≥95
Speaker: 16Ω 20mW x 2
Battery: 3.7V/170MAH
Operational Temperature: -10~60℃
Support Profiles: A2DP
Bluetooth: Class II

Package Content:
1 x Bluetooth Stereo Heasdet
1 x Micro USB Cable
1 x Instruction Manual
3 x Pairs of Earbuds (S / M / L)