The NBG-5000 holds 2 EN-EL9 batteries to offer double-length shooting time. It also features a vertical shutter release that makes shooting with the camera in a vertical position just as comfortable as shooting horizontally. Specifications: Improves stability. compatible with Nikon D5000 similar
Combination Contact and Non-contact rpm measurements with visible light...
Control your GoPro remotely from distances of up to 600? (180m) with this...