Cactus Laser Trigger LV5 Camera Remote Control, Black Effective distance between emitter and sensor: 150M in dark environment, 20M under strong and direct sunlight RF effective distance: 0.3M to 100M Number of radio channels: 16 Supported Sync speed: up to 1/1000S (subject to the cameras Sync speed limitation) Operating temperature: -20 DegreeC to +50 DegreeC (-4 DegreeF to 122 DegreeF)