Feature: 1. 16-selectable flash groups. Wireless triggering of flashes. 2. 50 meters above the regulation distance, maximum sync speed of 1 /250 sec. Switch the on-or-off of the modeling light or AF-assist beam, \u0026 buzzer. 3. Supports two power display mode ( 5.0-10.0 or 1/1-1/128 ). Receiver Mini compact flash powered, no batteries. 4. Large LCD display. Single point hot shoe, works with camera systems such as Canon, Nikon, Pentax, Olympus, etc. 5. Compatible flash: Witkey series flash, QT series flash, QS series flash, Gemini GT series, Gemini GS series. 6. 16-selectable flash groups. Wireless triggering of flashes. 50 meters above the regulation distance, maximum sync speed of 1 /250 sec. 7. Switch the on-or-off of the modeling light or AF-assist beam, \u0026 buzzer. Large LCD display. 8. Single point hot shoe, works with camera systems such as Canon, Nikon, Pentax, Olympus, etc. Specification: Features: 16-selectable flash groups. Wireless triggering of flashes. 50 meters above the regulation distance, maximum sync speed of 1 /250 sec. Switch the on-or-off of the modeling light or AF-assist beam, & buzzer. Supports two power display mode ( 5.0-10.0 or 1/1-1/128 ). Receiver Mini compact flash powered, no batteries. Large LCD display. Single point hot shoe, works with camera systems such as Canon, Nikon, Pentax, Olympus, etc. Compatible flash: Witkey series flash, QT series flash, QS series flash, Gemini GT series, Gemini GS series. Specifications: Model FT-16 Transmitter Power Supply 3V (2 * AA Ni-MH or alkaline batteries) (Not included) Receiver Power Supply 5V ( power by flashes) Transmit Frequency 433MHz wireless remote system Workable Distance 50m / 164ft (open areas) Control on Flashes Flash power ratio Modeling lamp or AF-assist beam on / off Buzzer on / off Power-ratio display mode Flash triggering Max. Sync. Speed 1 / 250 seconds Channel 16 Transmitter Size Approx. 13.5 * 5.1 * 3.5cm / 5.3 * 2.0 * 1.4in Transmitter Weight 63g / 2.2oz Receiver Size Approx. 5.6 * 3.0 * 1.7cm / 2.2 * 1.2 * 0.7in Receiver Weight 11g / 0.4oz Package Size 20.5 * 13.8 * 5cm / 8.1 * 5.4 * 1.9in Package Weight 140g / 5.0oz Package List: 1 * FT-16 Transmitter 1 * FT-16 Receiver 1 * User Manual (English & Chinese) Note: This item only includes the trigger set, the camera and speedlite not include. Package List: 1 * FT-16 Transmitter 1 * FT-16 Receiver 1 * User Manual (English & Chinese) Note: This item only includes the trigger set, the camera and speedlite not include.