Nakamichi TW130NC Green-SR

Specification:
Earphone driver unit : dia 11mm
Frequency response : 20Hz-20KHz
Built-in rechargeable battery :
Li-polymer 40 mAh, 3.7V (each side)
Bluetooth V5.3
Bluetooth profile supports A2DP , AVRCP, HSP, HFP
Audo decode : SBC, AAC
Talk time : about 6 hours
Music time : about 7 hours
Charge time : about 1 hour
Standby time : 500 hours
Wireless range : 10m
Impedance : 32 ohm
Sensitivity : 107 +/- 3dB
Weight : 4g (each)
Dimension : 32.2 (L) x 23.5(H) x 21.2(W) mm