Solar 1/2-Mile Long Range Driveway Alarm

This alarm is a reliable and efficient security solution that detects movement within 10 to 30 feet and alerts you via a portable receiver. It is powered by a built-in rechargeable lithium-ion battery that can be charged using a solar panel or USB Type-C cable. Price drops from $19.99 to just $16.99. Shipping is free for prime members or on orders over $35.