Yongnuo RF-603C II Wireless Remote Flash Trigger C3 for Canon1D 5D 7D 10D 20D 30D 40D 50D,16 Channels,Hot shoe Locking System,Self-detecting System,Switch on Side

The new RF-603 II is improved version of RF-603, it is a remote shutter release as well as a multi-functional flash trigger which can synchronously trigger flashes and studio strobes. Through the transceiver based system each item can be used flexibly as trigger or receiver. The 2.4GHz wireless frequency is suitable in most countries and guarantees high speed, distance and stability. Within capacious areas, the remote control distance may reach to 100m. The synchronization speed can reach to 1/320, depending on the situation. Only 2 AAA batteries are required as power source for each item.