Vello Wireless ShutterBoss II Remote Switch with Digital Timer for Select Canon Cameras Frequency: 2.4 GHz | Range: 250' | Channels: 99 Number of Shots from 1-999 or Infinite | Long Exposures up to 99 H 59 Min 59 Sec | Delay Setting and Multi-Exposure Mode Dual-Function Release | Interval Control | Backlit LCD and LED Indicators Functions Wired or Wirelessly In the box: Transmitter, Receiver, 2.5mm Remote, Shutter Release Cable for Cameras with 2.5mm Sub-Mini Connections, 2.5mm Remote, Shutter Release Cable for Canon 3-Pin Cameras, 3V CR2 Battery, 2 x AAA Batteries, Limited 1-Year Manufacturer Warranty