1.Bluetooths version: V 5.0 
2.Battery: 50mAh (per earplug), 1500mAh (charge box) 
3.Charging time: about 1 hour (earphones), about 2 hours (charge box) 
4.Working temperature: -10 ° C -40 ° C 
5.Music playback / talk time: about 4.5 hours 
6.Charging voltage: DC 5V / 1A 
7.Waterproof rating: IPX5 
8.Supported protocols: HFP1.7, HSP1.2, A2DP1.3, AVRCP1.6, SPP1.2 and PBAP1.2, BDR/BLE