https://www.amazon.com/dp/B01JRASCDU
Features:
LONG RANGE CONNECTION - Motion Sensors can connect with Receivier from up to 350 feet away(in open space)!
PASSIVE DETECTION - Passive Infared (PIR) Technology continuously monitors for motion up to 25 feet away from sensor for any intrusion
ADJUSTABLE ALARM - Choose between high or low volume alerts and flash the LED warning lights. Privately be aware when sensors have notice guests arriving to your property or raise the volume to warn trespassers to go away
WEATHERPROOF CASE - Protecting your home shouldn't be left to nice days. Stay alert rain-or-shine with rain shedding sensor cases
LONG LASTING POWER - Alarm Base: 3x Size 'C' 1.5V Battery or 6V DC Power Adapter (Not Included); Motion Sensor: 1x 9V Battery Each (Not Included)