> radio wires

Features: Ideal for any size yard, even up to 10 acres. Safety features include: Digitally coded signal to prevent false activation. Only our transmitter can activate the receiver. Other brands' receivers can be activated by Televisions, cordless phones, garage door openers, etc. We use filters and coded signals to prevent this. Receiver Fail-Safe. If your pet gets trapped in the correction zone, the receiver will shut down after 20 seconds to prevent over correction. The Ultralight Receiver is completely Waterproof. Audio break alarm and light on the transmitter warns you if the wire has been broken. Along with our Deluxe Ultralight Receiver, the Ultralight is the smallest and lightest receiver available anywhere - bar none. Built-in lightning and surge protection for storm-prone areas. If you live in an area that is highly prone to lightning or surges, you may want to consider our Lightning Protection Module. Transmitter cover conceals range adjustment control to prevent tampering and accidental increases or decreases in signal. The only UL and CE rated system on the market. Less