Neewer LCD Timer Shutter Release Remote Control Cord for Nikon D4s D4 D3 D3x D3s D810 D800 D800E D2 D2H D2Hs D2X D2Xs D1 D1H D1X D200 D300 D300x D300s D700 Delay / Self Timer (DELAY) Just like the self timer on your camera. The TM timer remote switch allows you to set any delay (in 1 second increments) up to 99 hours, 59 minutes and 59 seconds. BULB/Long Exposure (LONG) It allows you to take time exposures up to 100 hours in length. Interval Timer (INTVL) The Interval Timer can be set to any time period up to 100 hours as well. If you set it to 10 minutes, for example, one exposure will be taken every 10 minutes until either the film runs out or the Exposure Count limit has been reached. Exposure Count (N) This setting permits you to set the number of exposures that will be taken, up to a total 399.