This is Hongdak MC-DC2 Timer Remote Controller for Nikon D90 D3100 Black! It is made of the highest quality cells， it has safety， reliability and efficiency.                                                                        Specifications                        Supported Cameras     Nikon， Canon， Sony， Samsung， Matsushita， Peheax， Olympus， Konica Minolta， etc    <br>          Time Delay     0s to 99hrs 59 min 59s in one-second increments    <br>          Exposure Time     0s to 99hrs 59 min 59s in one-second increments    <br>          Interval     1s to 99 hrs 59 min 59s in one-second increments    <br>          Number of Shots     1 to 399， - - (unlimited)    <br>          Power Source     Two AAA 1.5V LR03 Alkaline batteries (not include)    <br>          Battery Life     Approximately two moths of continuous shooting with a delay of 5min， an exposure time of 4 min 56s， and an interval of 5min. use of the illuminator will reduce battery life    <br>          Operating Temperature     -20 - +50&#8451; ( -4 - +122&#176;F)    <br>          Dimensions     Approximately 5.91 x 1.57 x 0.71 inch / 15.5 x 4 x 1.8 cm (L x W x H)    <br>          Cable Length     35.83 inch / 91 cm    <br>          Package Size     8.66 x 3.66 x 1.30 inch / 22 x 9.3 x 3.3 cm (L x W x H)    <br>          Color     Black    <br>          Weight     5.75 oz 163 g    <br>          Material     Plastic housing    <br>          Compatibility     Nikon D90 / D3100    <br>                                                             Package Includes                1 x Hongdak MC-DC2 Timer Remote Controller for Nikon D90 D3100 Black<br>    1 x User Manual<br>