Garmin Pro control 2 remote receiver system includes Pro control 2 handheld device and remote receiver for quick, reliable, wireless control of Dog training launchers/release the system has a range of more than one-half Mile, easy-to-read LCD display, separate launch and training modes and can control additional Pro control 2 remote receiver devices (sold separately). Pro control 2 remote receiver device has 3 selectable sounds. It works Independently with up to 2 Compatible Launcher/releaser devices. The rapid launch feature lets you control Multiple remote receiver devices with the push of a button.