Features: WIDE RANGE OF APPLICATIONDriveway alert, Perimeter alarm and etc. The infrared detection range of the solar sensors up to 190 feet, that means the infrared sensing terminals can be mounted up to 190 feet apart; and will send a wireless alarm signal back to the wireless alarm receiver up to 1/4 mile away anytime someone passes between the solar sensors(Actual range will vary depending on the local terrain). NO WIRING NO NEED TO REPLACE BATTERIESThe sensors are self-powered by solar recharged lithium ion batteries; no need sunlight, the nature light on cloudy and rainy days also can charge the batteries normally; requires no wiring(both the power cables and signal cables). (Note: when there is no natural light, the built in batteries can support 3-5 days of system operation, but the system is not suitable for long time indoor application) LOWER FALSE ALARM RATEThe use of active and multiple infrared beams reduce false alarms from small animals and small objects such as birds and falling leaves; super infrared penetrating power reduce false alarms from the bad weather such as rain/fog/snow; infrared analysis technology reduce false alarms from the other nature light sources interference such as sunlight. DIY DESIGN,SUPER EASY TO SET UP IN MINUTESThe KIT has been programmed already before shipped; no power cables because the sensor is solar powered; no signal cables because the signal is wireless transmission; so the installation time can be as little as a few minutes. FULLY EXPANDABLE SYSTEMthe kit includes 1 pair solar wireless photoelectric beam sensors and 1 piece AC/Battery powered new version alarm receiver. expandable up to 32 sensors and unlimited alarm receivers for complete coverage of your property. 4 volume levels adjustment and 35 ring tones optional. Match different ring tones with different sensors around your property to differentiate where motion is being detected. WATERPROOFWaterproof IP66 Fully-enclosed design, resistance to rain/fog/snow/etc (working temperature range from -30 to 70).Specification:Shell Material: High Strength ABSAlarm Mode: Wireless Transmission AlarmMaximum Number of Alerts in 24 hours: 50Working Voltage: DC 3.3VStatic Current: 600uAAlarm Current: 100mAInfrared Light Wavelength: 940NM20NMInfrared Beam Number: 2 BeamsWireless Transmitting Frequency: 433MHZBattery Type: Rechargeable Lithium Iron Phosphate BatteryBattery Capacity: 500MATransmitting Distance: 400MAction Distance: 100mmInfrared Distance: 60MDetection Distance: 20MDetection Angle: < 3 degreesWorking Temperature: -30~70IP Level: IP66Installation Method: Fixed to a bracket or wallPacking Included:2 x Solar Wireless Sensor1 x Wireless Alarm Receiver1 * User ManualNote:1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.