Features: This set includes 1 transmitter, 3 receivers and 1 sync 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, Nikon, Olympus, 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: 148g / 5.2oz (approx.) Package List: 1 * Transmitter 3 * Receivers (AAA battery not included) 1 * PC Sync Cable (2.5 mm to PC) 1 * English Manual Note: 1.This flash trigger is not suitable for Sony because of its special hot shoe. 2. It does not support TTLfunction.