Features: This set includes 1 transmitter, 2 receivers and 1 sync wire cable. Features 433MHz frequency and 16 independent channels. Transmission distance up to 30 meters, with strong anti-interference ability, no direction or angle limit. The receiver trigger is powered by dry batteries, and its maximum synchronous speed reaches up to 1/250 seconds. 1/4 inch screw hole design, can be mounted to a tripod for fixing the flash. Universal hot shoe. Suitable for Canon, for Nikon , for Olympus, for Pentax and other flash units with universal hot shoe. Specification: Brand: VBESTLIFE Material: Metal+Plastic Compatible flash models: -For Nikon SB-900, SB-800, SB-600, SB-28, SB-27, SB-26, SB-25, SB-24 -For Canon 580EX II, 580EX, 550EX, 540EZ, 520EZ, 430EX/EXII, 430EZ, 420EX, 420EZ, 380EX -For Pentax AF-540 FGZ, AF-360 FGZ, AF-400 FT, AF-240 FT -For Olympus FL-50, FL36 -For Sigma EF-500 DG Super, EF-500 DG ST, EF-430 -For Sunpak Auto 2000DZ, 622 Pro, 433AF, 433D, 383, 355AFm 344D, 333D -For Yongnuo YN-460II YN-468 YN-560 YN-462 YN-465 YN-467 Transmitter Power Supply: 23A 12V microbattery (included) Transmitter Power Supply: 2* 1.5V AAA batteries (NOT included) Outdoor Working Distance: Max. 30m / 90ft (open area, barrier-free) Indoor Operating Distance: Max. 25m / 75ft Number of Channels: 16 channels Frequency: 433MHz Sync Speed: Max. 1/250s Color: Black Package Weight: 112g (approx.) Package List: 1 * Transmitter 2 * Receivers (AAA battery not included) 1 * PC Sync Cable (2.5 mm to PC) 1 * English Manual Note: 1. Not suitable for Sony because of its special hot shoe. 2. This flash trigger does not support TTL function. .