Universal slave strobe for use with digital or film cameras, housing Depth Rated to 200 feet / 61 meters. Flash Sync Sensor, Auto light sensor with 3 levels, Pre-flash settings, diffuser holder with 3 diffusers. Guide Number (ISO 100): 40’ / 12m, Flash Recycling Time: Approx. 0.5~8 sec, Number of Flashes: Approx. 80~200 flashes with 2 AAA alkaline batteries.