The Wireless Home Security Kit.

This simple-to-install security system wirelessly links two motion-detecting sensors to a keypad alarm up to 200' away, averting the costly hard-wiring required for other systems. The passive infrared sensors detect movement up to 40 feet away within a 110° sweep and instantly transmit a 315 MHz wireless signal to the keypad alarm. When triggered, the system affords a 15-second window to enter the user-specified four-digit code before sounding the piercing 110-decibel alarm--as loud as a rock concert. The system can also be set to a simple, single chime as an alert and operated with the included remote. All components easily wall-mount with only a few screws. Includes four AA batteries for the keypad alarm, two AAA batteries for each of the sensors, and 3V lithium battery for the remote. Sensors 4" H x 4" W x 4" D; keypad 5 3/4" H x 4" W x 1 1/2" D. (1 1/4 lbs.)