PIXEL X900C E-TTL Li-ion Battery 2.4G Speedlite Flash for Canon DSLR Camera GN60 HSS 1/8000s Auto-Focus w/Built-in 2.4GHz Wireless TTL Receiver Runs on powerful 3200mAh, 7.4V Li-ion battery pack with exponentially more power than AA batteries of any type. Full power recycle times are less than 1.5 seconds. Approximately 700 full power flashes per charge Compatible with Canon E-TTL, has a powerful guide number 197' at ISO 100 and 200mm, supports TTL / M / MULTI / RPT / S1 / S2 flash modes Built-In 2.4GHz wireless radio receiver to work with PIXEL KING PRO transmitter (not included), functions as slave TTL in 100 meters transmission distance. The flash also supports optical master or slave function. NOTE: The 2.4G receiver is ONLY controlled by PIXEL King Pro trigger Featuring 1/8000 high-speed sync and front / rear curtain sync. A impressive zoom automatically or manually from 20-200mm Laser AF assist lamp with crisscross pattern for instant autofocus even in complete dark on low contrast surfaces. Also equipped with a 4W built-in white LED light for AF illuminator for faster autofocus