Earphones Size: 25mm x 17.4mm x 26mm Weight: 5.9g/earpiece Battery Capacity: 55mAH/earpiece Charge Time: 1hr Effective Voltage: 3.3V-4.2V Standby: 110hr Music Play Time: 5-6hr Talk time: 4-5hr Bluetooth Version: 5.0 Pf Transmission Power: Class 2 Transmission Distance: >10m, up to 50 (depending...