Feature: 1. The kit includes a transmitter, a receiver, and a sync line, making it a good device for photography enthusiasts to wirelessly control their camera's flash. 2. Light weight and easy to carry, the receiver is powered by 2 AAA batteries and the transmitter is powered by built‑in batteries. There is a 1/4in screw hole at the bottom for easy mounting. 3. Universal hot shoe, compatible with cameras such as for Canon, for Nikon, for Olympus, for Pentax, etc. (except for Sony, because they use special hot boots), sync up to 1/250 second. 4. Universal 433MHz frequency, 16 independent channels, suitable for specific shooting environment, signal transmission within the range of 25-30m is reliable and fast, suitable for indoor and outdoor use, to meet various shooting requirements. 5. Equipped with a PC sync cable, suitable for cameras without hot shoe. Suitable for professional photography enthusiasts and photographers who often use the overhead flash. It can be used on the top flash of different brands to realize off‑machine flash, which is convenient for photographers to supplement the light. Specification: Item Type: Flash Trigger Material: Metal + Plastic Colour: Black Weight: Approx.75g/2.6oz Channels: 16 Channels Frequency: 433MHz Synchronization Speed: Maximum 1/250 Second Indoor Operating Distance: Up to 25m/82ft Outdoor Working Distance: Maximum 30m/98.4ft (open Area, Barrier-free) Receiver Power Supply (ac): 2 x 1.5V AAA Battery (without Battery) Transmitter Power Supply: 23A 12V 50mAh Micro Built-in Battery (with Built-in Battery) Compatible Flash Models: For Nikon SB-900, SB-800, SB-600, SB-28, SB-27, SB-26, SB-25, SB-24; For Canon580EX 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. Package List: 1 x Transmitter1 x Receiver1 x Flashing Wire1 x Manual Note: 1. Do not disassemble without authorization. Repair or modify this product without the authorized maintenance personnel of our company. Do not repair it by yourself, otherwise it will be deemed as a voluntary waiver of the warranty service.2. Do not place this product in direct sunlight or high temperature. Do not expose this product to rain or splashes in humid and dusty places. At the same time, prevent metal parts or sand from entering the fuselage.3. Do not touch the switch of the connection line with wet hands. When removing the plug, please apply force to the plug instead of the connection line. When the connection line is found to be damaged, please stop using it immediately.4. Do not use this product in a high temperature, humid, flammable, explosive environment or an environment with a lot of dust.5. Do not allow children to play with this product when storing it, keep it out of sight of children. 6. Only use the batteries listed in this manual, do not mix old and new batteries.7.Please install the battery in the direction of the positive and negative poles of the battery.8. When the product is not used for a long time, or the battery is exhausted, please remove the battery.