K20

Specification:
 
Chipset: CSR8635
Bluetooth verstioin: V5.0
Track system: stereo
Working frequency: 2.402-2.480GHz
support: HSP / HFP / A2DP /AVRCP/BLE
Working distance: ≤10M
SNR: 90dB
Response frequency: 80～5000Hz
vibrator unit: Φ 18，8Ω ±15%，90±3dB，300mW
Microphone: -42±3dB