Their wireless DWA-8 driveway alarms last for decades and never give false alarms! I have purchased 10 of their wireless DWA-8 driveway alarm transmitters, 3 of their wireless DWA-8 driveway alarm receivers, and 3 loud ringing bells(the loud ringing bells connect to the receivers using speaker wire and I have 1 of the bells 100ft from the receiver and it still rings perfect every time and you can run much longer speaker wires if you want). The loud ringing bells can also be mounted outdoors in a dry location to scare off intruders but they may get on your neighbors nerves when they ring. Reliable Chimes also sells strobe lights that can be mounted outdoors to scare off intruders (try to mount your strobe light in a dry location outdoors to make the strobe light last longer and don't drop the strobe light during installation or you may destroy the strobe lights bulb or break it's amber colored cover lens). The strobe lights can be used by a hearing impaired person to see when the alarm is sounding and for use in a noisy environment to see when your alarm is sounding (one example is if you have your stereo system cranked up real loud you could see the strobe light when the alarm is sounding). You can connect both the loud ringing bell and strobe light (using speaker wire) to a single receiver without any problems, just make sure you always connect the + positive and - negative speaker wire to the correct + positive and - negative screws on the receivers (never connect + positive to - negative or you may damage the receiver). They never give false alarms and will last for decades. The transmitters are waterproof and run off small DC batteries and the batteries last up to 8 months. The transmitters can also be mounted indoors if you want. The receivers are not waterproof and work off small AC powered transformer cubes. All 10 transmitters work using 1 receiver or multiple receivers and loud ringing bells. 0ld models are also compatible with new models. The receivers can be connected to a loud ringing bell that will wake you up so you can look at your security cameras. Reliable Chimes also sells the loud ringing bells. They ship fast! I live in southeast KY and I usually get my items within 2 days. I highly recommend Reliable Chimes!!!! These wireless motion sensor driveway alarms have great range because I have some transmitters 200 ft from the receiver and they still work perfect and I am sure their range is much greater! These could end up saving your life and your property and you can't put no price on your life or a family members life. These transmitters and receivers only cost $75.00 each and you can add another transmitter or receiver and loud ringing bell in several other rooms at any time! You don't have to use a loud ringing bell because these receivers have built in chimes but the chimes are not real loud and may not wake you up while sleeping. I highly recommend that you also buy the loud ringing bells to wake you up while sleeping. You can also install a simple on/off switch in the loud ringing bell's - negative speaker wire(at any point along the speaker wire) to turn off the loud ringing bell any time you like. You can also put a simple single pole single throw switch (spst) in the - negative speaker wire at any point along the speaker wire to turn off the strobe light any time you like. Get this system and you will not be disappointed!