K1 Bluetooth Headphone & Transmitter Kit

• Bluetooth Headphone with Bluetooth Transmitter Charging Base
• Material:PC+ABS
• Noise Isolation:Passive;
• Driver size:40mm
• Impedance:32Ω±15%
• Sound Pressure level:117dB±3
• Frequency Range:20Hz to 20KHz
• Max Distortion:≤3%
• Bluetooth Version:Bluetooth V5.0
• Bluetooth Profile:AVRCP,A2DP,HSP,HFP
• Bluetooth transmitter:A2DP
• Audio Technology:aptx low latency,aptx,AAC,SBC
• Transmitter Audio Techonoly:aptx low latency,aptx,SBC
• Operation Range:10m,Class 2 
• Microphone:ECM,omni-directional,
  -40dB±3dB
• Controls:Call,Track selection,Volume,Siri

   activation by button
• Battery:400mAh,Lithium polymer type
• Bluetooth transmitter:No,powered by charging cable
• Battery Life:20hrs
• Charging interface:Micro USB
• Charging time:2hours
• Dimension:184.4*169.4*80mm,

  BT transmitter&charging base:160.5*94.8*40mm
• Weight:240g