?EXPANDABLE? Many of these units can receive from multiple sensor units, and can even be setup to give a different chime from each sensor, so you know where to look for intruders. The multi-receiver method would work much the same way as multiple senders, and if both can "see" (pick up signal from sensor) should work as you intend, just follow instructions for multi setup. NOTE, 4 AA 1.5 Volt Batteries for the transmitter / motion sensor (NOT INCLUDED). ?58 CHIMES & 5 VOLUME LEVELS? Not only serves as a driveway motion sensor detector alert, but also a wireless doorbell to remind visitors coming. There are 58 different chimes for the driveway sensor. The doorbell just has one doorbell chime. 5 adjustable level volumes (mute mode included) for a 0-110dB volume range. You can unplug the receiver during the day without it losing it's set chimes. You can set each sensor to have a different chime, so that you know which sensor was triggered. ?WEATHERPROOF & WATERPROOF IP55? The hooded driveway sensor/Alarm sounds only when triggered (something moving about). The motion activated alert is a convenient and affordable safety / security system. It features weatherproof motion sensor which could be placed in the outdoor or indoor as needed. The outdoor motion sensor is fully-enclosed design, resistance to rain / fog / snow / wind / temperature change and etc. ?LONG RANGE & EASY TO INSTALL? The receiver (bell) plugs into an electric outlet and can be as must as 600 feet (150 Meters) from the motion sensor unit. Aim the Passive Infrared (PIR) sensor to cover what area of property you need alerted to, it detects movement between 16ft/5m, 60 angle, it is the perfect range to reduce false alarm. The notification unit plugs into a standard wall receptacle (120 volt) and can blink and/or play whatever sound/tune you set it to. ?2-in-1 Functions Driveway Alarm? It comes with the Passive Infrared (PIR) motion sensor, an alert/chime and a wireless doorbell. The larger unit with hood attaches anywhere you'd want a motion sensor (eg. facing driveway entrance/gate), thin square unit plugs into wall or extension cord plug and the small rectangular unit with button goes near front door to be used like a push button doorbell (23A 12V Battery INCLUDED).

Maximum Range: 16 Feet, 600 Feet. Item Weight: 10.5 Ounces. Power Source: Battery Powered,Electric. Color: Black. Brand: COTINSE. Date First Available: January 12, 2022. Best Sellers Rank: #510 in Devices & Accessories. Customer Reviews: 4.0 out of 5 stars 144 ratings 4.0 out of 5 stars. : B09PQ864C5. Battery Cell Type: ?Alkaline. Batteries Required?: ?No. Batteries Included?: ?No. Material: ?ABS. Style: ?A 2 Receiver+1 Sensors. Item model number: ?B26-DA-1T1. Product Dimensions: ?4.72 x 2.36 x 6.69 inches. Item Weight: ?10.5 ounces. Manufacturer: ?COTINSE. Mounting Type: ?Wall Mount. Maximum Range: ?16 Feet, 600 Feet. Item Weight: ?10.5 Ounces. Power Source: ?Battery Powered,Electric. Color: ?Black. Brand: ?COTINSE.