Yongnuo YN510 EX Slave TTL Speedlight is compatible with Nikon and Canon's wireless flash system. It can be triggered by 600EX-RT, 580EX II, SB-910/900/800/700, 7D/60D/600D, C command of Nikon's built-in flash and wireless signal of ST-E2 respectively, enabling off-camera TTL mode as well as manual flash It therefore is a universal model which works with both brands, so you don't need to worry about buying a new flash if you change cameras. It functions also as a camera hotshoe flash on any camera except Sony. Specifications: Circuit design: IGBT Guide no: 53 (ISO100, 105MM) Flash mode: M, multi, Sc, Sn, S1, S2 Zoom range: 24, 28, 35, 50, 70, 80, 105mm Vertical rotation: -7 to 90€Lcr Horizontal rotation angle: 0 to 270€Lcr Power supply: 4 X AA batteries Lighting time: 100 to 1, 500 times (AA alkaline cell used) Recycle time: Approximate 3s Color temperature: 5, 600K Flash time: 1/200 to 1/20000s Flash control: 8 levels of output control (1/12/-1/1, 29 levels of fine tuning) External interface: Hot shoe, PC port Wireless trigger distance: 20 to 25m indoor, 10 to 15m outdoor Additional features: High speed sync, fear curtain sync, FEC, FEB, FEV, the electronic flash head zooming, sound prompt, automatic saving setting, PC port, power saving mode, over heat protection, advanced setting 1x mini stand Features: Yongnuo 510EX is a high guide number 53 (ISO100, 105MM) manual speedlight, supporting remote TTL and M, Multi modes. The YN-510EX can be triggered by hot-shoe, flash command slave mode, optical S1, and S2 (pre-flash cancelled mode). The YN-510EX covers a focal length range of 24 to 105mm In the case of remote mode, FEC, FEB, Rear-curtain sync, FE lock is supported. It only takes 3 seconds recharging YN-510EX provides a PC port to trigger the flash by sync cord from camera. Sound prompt function, Customize the unit according to your shooting preferences. YN-510EX can save the current settings automatically.