The hahnel Giga T Pro II 2.4 GHz Wireless Timer Remote for Sony combines the functions of a wireless remote shutter release and a remote timer into a single very useful accessory operating at 2.4 GHz with a range of 328'. Using the small, lightweight receiver and transmitter (batteries included) you have access to programmable features such as a self timer, interval timer, long exposure setting, and exposure count--all of which may be used in any combination, making the possibilities nearly limitless. There is no limit to the possible number of exposures, and an exposure as long as 99 hours, 59 minutes and 59 seconds can be programmed.