camera Speedlight with lithium battery has capability to work with Nikon i-TTL and Canon E- TTL. The flash fires at s high-speed sync of up to 1/8000 a second, supported on or off- camera. Guide number (GN) of 56 (Iso-100, 180mm) Model NO.: TR-870 Guide No: 58(100, 180m) Model: Manual Flash, I-TTL & E-TTL (Master and Slave), Multi Flash Rear-Curtain Sync: Yes Power Save Mode: Yes Overheating Protection: Yes Quick Response: Full Output Recycle Time Only 2.9 Seconds Support High Speed Continuous Shooting: in 1/16 or Less Brightness, It Can Support 12 Step Support Red-Eye Reductin Flash Mode: Yes 1.3 watt LED model bulb for extra fill in light 2.Wireless master and slave function : compatible with Canon ,Nikon wire flash system 3.Flash exposure bracketing(FEB),exposure compensation ,flash exposure lock 4.High speed sync : 1/8000s 5.Automatic save function 6.Large-sized LCD display 7.TTL model : compatible with Canon and flash Nikon system(Master and salve) 8.Manual model:compatible with Canon and flash Nikon system(Master and salve) 9.Mutil flash light:compatible with Canon and flash Nikon system(Master and salve) 10.Wireless master and salve function : compatible with Canon ,Nikon wireless flash system 11. Off camera : Optical flash (S1 and S2 model) 12.Rear curtain sync and front-curtain sync 13.Exposure bracketing 14.FV lock 15.Af assist 16.Menu operation (only for Canon) 17.Custom menu 18.LCD display 19.Flash structure : single flash tube 20.Color temperatuer : 5500+-200K 21.Voice prompt Package Includes:  Flash 1x Protective bag 1x Micro base 1x Color film 1x Diffuser cap 1x Lithium battery (LE-26) 1x Charger 1x Charger cable 1x User manual