The best gate alarms in comparison

How it works - Koostone Wireless Door Chime comes with 2 door window sensors and 1 receiver, and each sensor can set a separate sound with the receiver, that means you can know the front door or the back door or the mailbox opens without needing to go to see it. The sensors will detect the door window, and will be triggered to send out a signal when the door window opening. Receiver will receive the signal and alerts. It can be used as door chimes when door opens for business.

PORTABLE BED ALARM DEVICE The portable bed alarms and fall prevention for elderly device is applicable at various areas indoor such as bedroom, bedside floor, doorway, door exit, wall or any horizontal vertical surface. The convertible bottom stand enables the motion sensor to sit stable on flat surface or mount it on wall as elderly monitoring with included attachment accessories.

GARAGE ALARM SENSOR picks up any movement 20ft in front of it, and send a signal up to 500ft (in open area) long range back to the receiver which chimes. The passive infrared motion sensor can detect heat movement, 90 degree viewing radius from dead center, can be adjusted by 2 window covers in the kit. With the durable plastic lens and weather resistant casing (waterproof IPV4), it is suitable for monitoring proximity outdoor areas such as driveway alarm, garage shed alarm, gate alarm, etc.

Long Distance Wireless and Reliable Battery Life With its long-distance wireless capabilities, this driveway alarm can cover up to 500ft in distance, providing reliable detection of approaching vehicles or pedestrians. It also features a powerful battery that trigger 50 times a day, the sensor's battery can be used for a year, ensuring you always have an alert system you can count on.

Pre-Warning Alarm, Deters Break in Before The Damage Is Done

Full function control, self-adaptation to the environment and troubleshooting

Requires Ring Alarm Base Station. Compatible with 1st and 2nd generation Ring Alarm devices and accessories.

Trustworthy Infrared Sensor - The TOPENS TC102 Safety Photo Eye Beam Sensor employs infrared light for object detection, creating a safety barrier between the emitter and receiver. This photoelectric sensor identifies any movement interruption in the infrared beam, prompting the gate to stop or reverse automatically. It is strongly recommended to use the TC102 IR beam sensor with automatic gate opener system to ensure multiple protection & security.

52 MP3 Door Chime & Mute -- This wireless door entry alert for shop has 5 levels of adjustable volume from 0-110 dB. Offer 52 elegant mp3 music from the traditional"Ding Dong" to various well know chimes. Memory function Keep the previous setted tune after re-plugging it.

MULTIPURPOSE Ideal for front doors, window frames, mailbox alert, walking paths, entry alert chime, pet monitor alarm and anywhere in your home you want to be alerted to motion. Also great to alert business owners that are working in the back, or out of sight, to customers entering their store.

WIFI and GSM Security System Working Mode The homekit home alarm supports two working modes. The first mode WIFI no SIM, no phone line, no monthly fee, no need to sign a contract with a security company, you can install it directly and have an alarm function on the spot. The second mode the alarm also supports the SIM card function and you can use your mobile phone to control it remotely

Reliable Range The transmission range of sensor detects motion up to 280m 918ft and detection range of the infrared sensor approximately 2 8m 6.6 26ft to effectively keep you alerted. When the movement is detected by the sensor,the receiver will make an audible sound and the LED light will flash.