Phottix Laso TTL Flash Trigger Transmitter for Canon (PH89092) The Phottix Laso Transmitter can control and trigger radio enabled Canon Speedlites and supports multiple flash modes, including E-TTL II/E-TTL, manual, multi, Ext. A and linked shooting Can also control combination of non-radio enabled Canon E-TTL or E-TTL II Speedlites when used in combination with the Phottix Laso Receiver Offers 15 Channels with Digital ID that can be separated into 5 Groups at a total range of 328 feet, providing the ultimage control over any lighting setup Supports High Speed Sync of up to 1/8000th Shutter Speed for more creative lighting effects Features an AF Assist Light for easier focusing in low-light situations