Work frequency: 433MHz, 16 channels optional. Synchronization speed: 1/200s, wireless control working distances is up to 30 meters. Godox RTR-16 receiver works with godox RT-16, CT-16, AT-16, and neewer RT-16 flash transmitter( that also features 433MHz signal), can receive their commands to realize flash synchronization. The RTR-16 receiver requires 2* AAA batteries(NOT INCLUDE), comes with 6.35mm to 3.5mm jack adapter, allows the receiver plug into 6.35mm "SYN" port studio flash lights. Flash Transmitter NOT Include. GODOX RTR-16 Flash Trigger Receiver fits for mostt of studio strobe light, is a basic universal 433MHz 16 Channels Trigger Receiver, Work with RT-16 CT-16 AT-16 flash trigger transmitter.