MicroSync VM2T Wireless Transmitter, 16 Channels, 200' Range, Long Battery Life MicroSync VM2T Wireless Transmitter - CR2032 Battery - MicroSync Warranty The Freedom of Wireless: Whether you're shooting in the studio or on location, firing your strobes with a sync cord can be impractical, inconvenient and sometimes even impossible. Not anymore! The MicroSync II allows you to fire strobes wirelessly Ultra-small, Light and Convenient: The MicroSync II is revolutionary because it is super miniature, extremely lightweight and almost operates itself. Just place the transmitter in the hot shoe of your camera, plug the receiver into your strobe's power pack and fire! It's that easy Automatic Power Management: The MicroSync II has a unique automatic power management system. There are no on/off switches on the transmitter or receiver. When you press the shutter, the transmitter turns itself on and sends the signal to the receiver to fire your lights 16 Channels: There are sixteen channels on the MicroSync II to allow you to shoot without interference from other MicroSync II users in close proximity