1. 16-channel design, strong anti-interference capability. 2. Strong compatibility, mitter adopts single contact design, suitable for Canon, for Sony, for Nikon, for Pentax camera etc. 3. High-performance with working frequency 433MHz, the highest synchronous speed can reach 1/250s, maximum working distance is 30 meters, suitable for 360-degree professional shooting in different environments. 4. Equipped with an adapter, which allows free conversion between 3.5mm and 6.35mm, and convenient for more studio flash lights. 5. The receiver is used with two AAA batteries (not included). Low power consumption and long life time. mitter Battery: 23A-12V Battery (Included) Receiver Battery: 2 * AAA (Not included) Channel: 16 Max. Working Distance: 30m Working Frequency: 433Mhz Synchronization Speed: 1/250s Application: Studio Flash Light Color: Black Material: plastic Package Contents: 1 * Wireless Studio Flash Trigger Kit (Without 2 * AAA batteries) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.