Bluetooth version：5.1 Phone calls time：180 hours or so ( to be used with charging cabin ) Product parameters： Charging box：2000mah Mode：M9 functionsVolume reduction ( to-uch the left earphone triple in a ) the previous song ( to-uch the left earphone seconds )Turn On / Off ( Long press the earphone for 5 seconds )Applicable products Smart matching mobile phones tablet computerscompartment and close the lid the earphone wi / / sincTearphone charging : Put the earphone in the chargingautomatically charge the earphone will light upCharging method red when charging and turn off when fully chargedCharge cabin charging : After connecting the cable the red light in the charging cabin lights up and thered light goes out when fully charged Features： ear cap * 1, charging cable * 1, Single headset：50mah Working distance： About 10 function： charging Operation mode： to-uch control Chinese and English manual * 1 Battery life：120 hours or so ( to be used with charging cabin ) Earphone * 2, Automatic boot up：support Automatic matching： support Package includes： Noise reductionCVC8 . 0 Charge the headset ：40 times or so Play / Pause ( light to-uch the left earphone onceAnswer / Hang up ( light tou-ch the left earphone onceProductSummon Siri ( long press the left earphone for 1 seconds )functionsVolume reduction ( tou-ch the left earphone triple in a ) the previous song ( to-uch the left earphone seconds )Turn On / Off ( Long press the earphone for 5 seconds )Applicable products Smart matching mobile phones tablet computersTearphone charging : Put the earphone in the chargingcompartment and close the lid the earphone willautomatically charge the earphone will light upCharging method red when charging and turn off when fully chargedCharge cabin charging : After connecting the cable the red light in the charging cabin lights up and thered light goes out when fully charged Input current：5V 1A Glasses Headphones Ear Buds Wireless Earbuds for Android