Vello FreeWave Fusion Wireless Flash Trigger & Remote Control for Canon SLR 2.4GHz Reduced Interference Frequency | Range Up to 320' (100 m) | Individual/Group Wireless Flash Trigger Up to 3 Light Groups/7 Grp Combinations | Flash Sync Speed of Up to 1/320s | Wired/Wireless Modes | Receiver Works With Multiple Cameras | Dual-Function Shutter Release Button | LED Indicators Shutter Release Cables Support: Canon EOS: 30's / 50 / 60D / 300 / 300D / 350D / 400 / 500D's / 600D / 1000D / 1100D (Digital Rebel XT / XTi / XSi / T1i / T2i / T3) / PowerShot: G10 / G11 / G12 / 10D / 20D / 30D / 40D / 50D / 5D / 5D Mark II: / 7D / 1D / 1Ds / 1D Mark II / 1Ds Mark II / 1D Mark II N / 1D Mark III / 1Ds Mark III / 1D Mark IV Samsung: GX-1S / GX-1L / GX-10 - 20 / NX Series Contax: N / 645 Pentax K110D / K100D / K200D / K10D / K20D / K-5 / K-7 / *ist DS / DS2 / DL2 / DL / D Wake-Up Function in TTL Flashes Simply depress the trigger button on the transmitter half-way to pull the flash out of "sleep-mode". Sleep mode allows the flash to power down in between shooting sessions to extend battery life. The wake-up function is only available when used as part of a complete Canon TTL system. Whats In The Box: Wireless Transmitter, Wireless Receiver, 2Shutter Release Cables, Studio Trigger Cable (3.5mm Mini), Studio Trigger Adapter (3.5mm Mini to 1/4" Phono), 2AAA Batteries, Lithium-Ion Battery (Pre-Installed), 1-Year Limited Warranty