The American Tech Network ABMUABL1500 is a high-quality range finder designed to convert your ATN Smart Sight into a precision hunting device. It\'s not only effective but also easy to install - you just need to attach it to the front of your Smart Sight.Once installed, you need to pair the device through Bluetooth and initiate the Zero-in process for fine-tuning the adjustment. This range finder is fully compatible with ATN Smart HD Day, Night, and Thermal riflescopes, extending their capabilities and improving your hunting experience.