Designed for use with the 612 caller, this handheld remote control will transmit 100-plus yards, depending on conditions. You can turn your 612 caller on and off, or raise or lower the volume with a push of a button. The RC-3 remote control allows you to direct prey where you want them to go without giving away your position. The unit slides easily into the existing fixture on your 612 caller. The wires on the receiver unit are connected directly into your wildlife caller's jacks; no tools are needed. The RC-3 requires a 9-volt battery (not included).