Satechi WR-M100 Wireless Camera Remote Control for Nikon D90 fully compatible with MC-DC2 100 M range; does not require line-of-sight release 3-mode operation for shutter, sleep, and lock; locking function for bulb exposure Supports unique coding for anti-interference and avoiding wrong operation With rechargeable lithium battery and charging device that has LED indicator Fully compatible to:Nikon D90