Features:
up to a 400ft range between the receiver and transmitter
weatherproof motion sensor with up to a 25ft detection range
portable: easily move the sensor and receiver where you need them
5 different alert sounds
adjustable volume
low battery indicator on the receiver and sensor
keyhole screw mounts on the receiver and sensor
 
The sensor is powered by (3) AAA batteries [not included] and the receiver can be powered by (3) C batteries or a 5V, 500mA power adapter [batteries or power adapter are not included]
 
The box includes a Driveway Alert Receiver, Sensor, mounting screws and instructions.