Vello FreeWave Fusion Basic Wireless Flash Trigger System for Sony Cameras with (MIS) Multi Interface Shoe Frequency: 433 MHz | Flash Triggering Range up to 50' | Shutter Triggering Range up to 150' Channels: 16 | Flash Sync Speed up to 1/200 sec | Dual-Function Shutter Release Five-Second Delay Mode on Transmitter | Single, Continuous, Bulb, Timer Modes | Shutter Release & Flash Trigger Cables One 23A & Two AAA Batteries Included In The box: FreeWave Fusion Basic Transmitter, FreeWave Fusion Basic Receiver, 2.5mm to 3.5mm Sync Cord, 2.5mm to PC Male Sync Cord, 3.5mm to 1/4" Phono Adapter, 2 x AAA Alkaline Batteries, 23A 12V Alkaline Battery, Limited 1-Year Manufacturer Warranty