Vello Wireless ShutterBoss II Remote Switch with Digital Timer for Sony Multi-Terminal - Sony: a3000, a5000, a6000, a7, a7R, a7S, a77II, HX300, HX400, HX50v, RX100 Mark II, RX100 Mark III, a58 Frequency: 2.4 GHz | Range: 250' | Channels: 99 Number of Shots from 1-999 or Infinite | Long Exposures up to 99 Hr 59 Min 59 Sec | Delay Setting and Multi-Exposure Mode Dual-Function Release | Interval Control | Backlit LCD and LED Indicators Functions Wired or Wirelessly Includes: Vello Wireless ShutterBoss II Remote Switch with Digital Timer for Sony Multi-Terminal, Transmitter, Receiver, 2.5mm Remote Shutter Release Cable for Select Sony Cameras with Multi-Terminal, 3V CR2 Battery, 2 x AAA Batteries, Limited 1-Year Warranty