Dear buyer. When purchasing the XG-12 tws Bluetooth headset, please read the following instructions: Due to long-term transportation, the power of the XG12 tws will be exhausted. You will not be able to use the headset when you receive the package. It may be powered off. The first thing to do is to charge the headset box for 30 minutes. Very important. Thank you! Note: This product does not have a retail package box! ! ! Features: Bluetooth version: Bluetooth 5.0 Transmission distance: outdoor straight line distance 10-15 meters Battery capacity: polymer lithium battery Function: fast charging, HD call Listening to music time: 3 hours Up and down music / pause playback Call time: 4 hours Standby time: 130 hours Charging time: 1-2 hours Product specifications: full set weight: 75g Packing specification: 10*8*3.5cm 1 x tws bluetooth earphones (left and right earphones) 1 x Charging box 1 x USB Charging Cable 1 x User Manual 6x Ear Caps (two are equipped on the earbuds) Note: This product does not have a retail package box! ! !