Features: 1.Waterproof Design: Driveway alert is designed to withstand outdoor conditions, ensuring that it remains functional even in rainy conditions. 2.Separate Transmitter and Receiver: The separate design of the transmitter and receiver allows for flexible installation in different locations, providing a convenient experience. 3.Multifunctional Alarm: Wireless driveway alarm serves not only as a door bell but also as a security alarm, ensuring the safety of your property. 4.38 Melodies: With a wide selection of melodies to choose from, door entry alert allows you to customize the alert sound to suit your preferences and needs. 5.Wide Application: Suitable for various locations such as driveways, hallways, and more, provides comprehensive door bell coverage to meet different needs. Specification: Item Type: Driveway Alert_x000D_ Material: ABS_x000D_ Receiver Size: Approx. 80 x 76 x 33mm / 3.1 x 3 x 1.3in_x000D_ Transmitter Size: Approx. 90 x 80 x 53mm / 3.5 x 3.1 x 2.1in_x000D_ Transmitter: Battery Type: Lithium Battery, Battery Type: 1.5VAAA x 3 (not included)_x000D_ Operating Frequency: 433MHZ_x000D_ Receiver keys:_x000D_ (1) Music: 38 music optional, side of the music button to adjust_x000D_ (2) Volume: three volume adjustment (high, medium, low) side of the volume button for adjustment_x000D_ (3) can be set with and without sound (sound: sound + indicator. No sound: indicator)_x000D_ Working Distance: Approx. 100m / 328ft_x000D_ Transmitter Sensing Distance: Approx. 7m / 23ft PackageList: 1 x Transmitter 1 x Receiver 1 x Connector 1 x Base 2 x Screws 2 x Expansion Bolts 1 x English Manual