Specification:

Model: TWS-K2
Product Type: True Wireless (TWS) Bluetooth Stereo Headphone.
Bluetooth Version: Bluetooth 4.1 (CSR)+ EDR; Class 2.
Supports HSP, HFP, A2DP, AVRCP protocol.
Battery Capacity Display, supports for iPhone.
Frequency Response Range: 21Hz-18KHZ
Operation Range: Up to 10 meters
Microphone: Built-in high-sensitivity microphone (-38dB).
Impedance: 16Ω
Sensitivity: 95dB
Degree of distortion: ≤1%
SNR ≥95
Headset Battery: 60mAh Rechargeable Li-ion battery
Power Bank Box Battery: 1200mAh Rechargeable Li-ion battery
Charge Time (for Power Bank Box): About 2.0 hours
Music Playing Time: About 3 hours (The Music Volume will affect the time)
Talk Time: About 4 hours
Standby Time: 120 hours
Charge Time:1 ~ 2 hours
  
Package List:
1x K2 True Wireless Bluetooth Headset   
1x USB Cable