Had this for awhile... stopped using it awhile ago.
I unfortunately forgot to take out the batteries... so there is some corrosion which you can see.
Everything works great though... hope someone can use this.

The ShutterBossII Timer Remote Switch for Cameras with a Nikon DC2 Connector from Vello isa remote shutter release that provides photographers with enhanced levels ofexposure control. Featuring specialized functionality such as continuousshooting, self-timer, long time exposures, and interval shooting, theShutterBoss II is a huge asset to keep in your camera bag. This ShutterBoss iscompatible with cameras that have a DC2 connection, including Nikon D750, D610,D7200 and D7500 DSLRs.

With theShutterBoss you can set timer delays, exposure times, and intervals up to 99hours, 59 minutes, and 59 seconds in one-second increments. You can also selectfrom 1 to 399 continuous shots or set the device to take an unlimited number ofphotos. Since you can set exposures without touching the camera you willcapture clear, blur-free images. This remote has a 4-line backlit LCD statusdisplay for easy viewing of timer and exposure settings.

TheShutterBoss is great for time-lapse series of blooming flowers, sunsets, or thenight sky. It can also function as a simple manual remote shutter release.Simply establish the camera's settings and push the remote's shutterbutton halfway to focus and fully to shoot. In bulb mode, slide theshutter release button forward to lock and the shutter will stay open until yourelease it. 

TheShutterBoss II has added two features that will offer easier control over theremote's settings. First is a power off option which gives you the ability topower down the remote to conserve battery life. Second is a reset option thatallows the ShutterBoss settings to be reset to default settings with justthe hold of two buttons. A default reset is a time-saver when youwant to avoid changing each setting individually. 

Whetherit's for simple shutter release, extended self-timer options, continuousshooting, long exposures, or time-lapse shooting, the ShutterBoss II Remoteputs creative camera control in the palm of your hand.

CompatibleCameras

 

Nikon: Z7II, Z7, Z6 II, Z6, Z5, D780, D750, D610, D600, Df, D7500, D7200, D7100, D7000,D90, D5600, D5500, D5300, D5200, D5100, D5000, D3300, D3200, D3100

NikonCoolpix: P-1000, P980, P7800, P7700, Coolpix A

TimerFunctions

Settimer delays, exposure times, and intervals up to 99 hours, 59 minutes, or 59seconds in one-second increments.

ExposureFunctions

Programanywhere from one to 399 continuous shots, or even set the ShutterBoss to takean unlimited number of photos.

LCDDisplay

Thefour-line backlit LCD display makes it easy to set the following functions:self-timer, exposure, interval, and number of shots. It is also a statusindicator for battery life, timer functions, lock indicator, number of shots,and more.

AudibleBeep

TheShutterBoss provides an audible beep for the last three seconds of a countdowndelay or interval. It will also beep to confirm your settings. The beep can beturned off if necessary.

PowerOff and Reset Options

TheShutterBoss II has been updated with two new features, the Power Off optionwhich gives the ability to power the device off to conserve battery life andthe Reset option which allows the ShutterBoss to be reset to the defaultsettings, so that each setting does not need to be reset individually.

LongBattery Life

Poweredby two AAA batteries, it can last for about 60 days of continuous shooting withintervals of 5 minutes and exposures of 4 minutes and 56 seconds. When left onstandby, it can last up to 2 years.