The functions of this Solider include solo/grouping trigger function and shutter remote function. The grouping trigger can be set either group to operate on the transmitter.It can support the shutter speed up to 1/320s(The sync speed will be different for Various combination of camera and flash ). Solider is been used world wide as free 2.4GHz frequency.It can be set the channel by cross-over point which has a stronger anti-interference ability. This product is be used as FSK modulation which is more stabilize. Unique power saving method that can save more battery life for both the transmitter and receiver. Features Flash sync speed is up to 1/320s.(The sync speed will be different for Various combination of camera and flash ) With wake up function for flash gun, it will not miss every shooting opportunity.(Wake up can only used in TTL Compatible flash) Through the hot-shoe to trigger the flashgun, and through the socket to trigger th studio light. Shutter remote control function available and you can remote control different camera through changing shutter remote connecting wire.(Shutter remote cable to be purchased separately) Maximum operating distance is up to 80 meters. Ultra-low power consumption; transmitter standby time for 2 years, receiver standby for 300 hours. Low voltage design, rechargeable battery available. Multi power source design, directly supply the power through the power socket. Package Included: TF-372TX (Transmitter) x1 TF-372RX (Receiver) x1 CR2032 Lithium Battery x1(In the transmitter) CL-3.5 cable x1 3.5mm switch to 6.35mm plug x1 Receiver holding mount x1(The holding mount is for studio lamp. It has double tape sticker) Receiver Hot shoe protection cover x1 User Manual x1 (Original Manufactory Package)