Jack
That is a Hähnel Captur Timer Kit Wireless Remote Shutter Release & Timer Remote.
Ideal for:
• Ideal for time-lapse photography
• Time Lapse & Bulb Exposures
• Single / Continuous / Bulb Modes
• Two Timing Sequences
• Connect to camera with connector cables supplied
• DCM - Digital Channel Matching
• AA Battery Powered
• 100m Range
• Additional receivers available to fire multiple DSLRs
• Can be integrated with other Captur Modules
• Larger easy to read LCD