Product information:
  
   
  
 
 Bluetooth version: Bluetooth 5.0
 
 Transmit power: 8dBm+/-2dbm
 
 Working frequency band: 2.4G ISM band (2.402-2.480GHZ)
 
 Charging voltage: 5V
 
 Working voltage: 3.7V
 
 Battery specifications: polymer lithium battery (45mAh with protective plate)
 
 Support protocol: A2DP1.3/HFP1.7/HSP1.2/AVRCP 1.6/EDR/AAC
 
 Headphone weight: about 5.0g
 
 Speaker parameters:
 
 Ohm: DCR: 32Ω ± 15% ACR: 32Ω ± 15% ohm
 
 Sensitivity: 99dB±3(at 1.0KHZ) 1mW
 
 Frequency range: 20Hz to 20KHz
 
 Rated output power: 2mW
 
 Maximum output power: 5mW
 
 Speaker outer diameter: Ф10*2.5mm
  
  
  
  
 