Bluetooth version: 5.0- Music playback time: about 2.5-3 hours- Talk time: about 3 hours- Charging box battery capacity: 400 mAh- Headphone battery capacity: 45 mAh- Charging time: 70 minutes- charging box charging voltage 5V- Charge box to charge the headset: About 4 times- Simultaneous voice prompts on the left and right headphones when calling- The headset has a sound for the left and right ears of the two-channel call- Automatic matching, smart touch, support for Siri function Brand No Brand SKU 100714155_NP-1021164305