Nikon's ML-3 is an infrared-based remote release system for Nikon cameras with 10-pin accessory connectors. It includes a hotshoe-mounted receiver and a handheld remote with a range of up to 8m. But wait! There's more! You can also set this remote up in a "tripwire" mode that takes a picture when the IR signal is interrupted. Stores in a handy pouch.