Andoer 4 Channels Wireless Remote Speedlite Flash Trigger with Umbrella Hole/Holder Universal for Canon Nikon Pentax Olympus Sunpak Vivitar Camera DSLE Universal hot shoe interface, compatible with Canon, Nikon, Sigma, Olympus, Pentax, etc.Globally univeral 433Mhz frequency, 4 channels. With studio flash interface, can trigger several kinds of studio flashes.Transmitting distance up to 30M, no limits with directions or angles. 1/4" nut can be connected with tripod or light holder to make flashlight safe and stable.Speedy frequency regulation, convinient for photographers to shoot. Energy-saving design with 12V 23A battery of transmitter and 2 AAA batteries(not included) of receiver.Comes with a PC sync cord for cameras without hot shoe socket. Adds an umbrella holder, no need extra flash socket.Note: This trigger do not support TTL function.