upgrade via Type C USB port. User-friendly Design & Easy to Operate: LCD with clear display effect; with 5 group setting buttons, and 3 function buttons to realize quick setting; relocated Control-Wheel; quick lock hot-shot. Specifications: Brand: Godox Model: X2T-P Compatible Cameras: For Pentax cameras(TTL autoflash); Work with cameras with PC sync socket Compatible Mobile Phone: For iPhone, for Huawei, for Samsung (Please refer to the compatibility list on the manual to know more about the compatible models.) Power Supply: 2 * AA battery(battery is not included) TTL Autoflash: TTL Flash Exposure Compensation: ±3 stops in 1/3 stop increments Wireless Shutter Release: The receiver can control the camera shooting via. 3.5mm sync cord jack Zoom Setting: Adjust the focal length of the flash through the transmitter Firmware Upgrade: Support program firmware upgrade via. Type-C USB cable Memory Function: As long as 2 seconds after setting parameters, the parameters will be remembered, and the original data will be recovered once restart Wireless Transmission Range (approx.): 0-100m Other Functions: manual mode, multiflash mode, high-speed sync, rear-curtain sync, flash exposure lock, focus assist, modeling lamp, beeper. Built-in Wireless System: 2.4G wireless transmission Modulation Mode: MSK Channels: 32 Wireless ID: 01-99 Groups: 5 Display: Large LCD panel, backlighting ON or OFF Item Size: 7.2 * 7 * 5.8cm / 2.83 * 2.76 * 2.28in Item Weight: 90g / 3.2oz Package Size: 10.8 * 10.5 * 7cm / 4.3 * 4.1 * 2.8in Package Weight: 180g / 6.3oz Note: Batteries are not included. 1/8000s is achievable when the camera has a max. camera shutter speed of 1/8000s. Package List: 1 * Flash Trigger 1 * User Manual (English & Chinese)