ATC2K is an acronym for the Oregon Scientific All-Terrain-Camera 2000, a pocket-sized camera which can be used as a helmet cam or action cam.
The ATC2K is made waterproof through the use of two O-rings coated in silicone grease. The ATC2K is waterproof to 3 meters (10 feet).
The ATCK2 records directly onto an SD card. The ATC2K supports SD cards of up to 2GB and has 32mb of inbuilt memory.
The ATC2K offers 3 resolutions (640×480, 320×240, 160×120) and 2 frame rates (30fps and 15fps). On the highest settings a 2GB SD card would record an hours worth of footage.
The original version was not compatible with existing technologies such as RAM Mount hardware, but had its own mounting system. The 2008 version and newer ATC3K and ATC5K cameras include a tripod mount that can be used with a universal tripod screw.