Yison Celebrat A18 Bluetooth Headphone comes with Bluetooth Wireless Version: V 5.0. This Headphone featured with Working Frequency: 2402~2480 mhz, Transmission Distance: 10m, Optimal Distance: <6m> Drive Unit: 40mm, Impedance: 32ω±15 percent , Sensitivity: 97db±3db and Frequency Response: 20hz-10khz. Here used Lithium Battery 3.7v/ 300mAh. So that, you can enjoy Playing Time: About 8 Hours (70 percent Volume), Talk Time: About 6 Hours (90 percent Volume), Standby Time: About 50 Hours. And also it comes with Micro USB Dc5v 500ma Input Voltage and take About 2.5 Hours of Charging Time.