The BL 505 Add-On Bird Launcher is a must for those who are looking to simulate real hunting situations in a controlled environment. Loaded with features, like an Easy-Load trap door, the BL 505 Bird Launcher is an effective and essential tool in your dog's training program. This Add-On launcher will add to your BL transmitter (not included). FeaturesEasy-Load Trap Door for safe and easy loading of birdsTrap Door allows loading of multiple birds and unloading of unused birdsQuiet-Release prevents "spooking" your dogHigh quality nets/springs for effective launching and durabilityLarge scent holes - Up to 700 yard remote rangeAdd-On remote launchers are easy to program to transmitter (not included)Beeper/Locator on remote receiver make them easy to findBL 500 series good for quail/pigeon size birds