TR-Q8 supports TTL/HSS/front and rear curtain synchronization and other functions TR-Q8 uses advanced high-definition OLED full-color touch screen to intuitively and easily set parameters Built in litihum battery ,Charging time is about 2 hours,Continuous operation 7 hours Continuous remote control trigger flash 30000times Master/slave receiver and transceiver in one,CM conversion function,you can quickly switch between TTL automatic flash mode and manual flash mode to cope with different scenes Display:1.43-inch OLED touchscreen mode:TTL/auto/manual synchronous mode:Front curtain/rear curtain/high-speed synchronization wireless frequency:2.4GHz Flash distance:0~80M channel:CH:01-31 Group::A//D/E/F/G/H/I/J/L/O/P/Q/S/U Battery specifications:DC 3.7V 900mAh 3.33Wh lithium battery Battery life: 30,000 times continuous working time: 7 hours Charging time:about 2 hours Charge/upgrade:Type-C interface Color: As Shown Material: ABS Package Contents: 1 * TTL HSS Wireless Flash Trigger Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.