Doors bell open in comparison

Custom Sound, Flexible Modes Enjoy precise control with 5 volume levels up to 110 dB, perfect for the hard of hearing or elderly. Easily switch between LED only or LED + ring modes and select from 55 melodies for personalized alerts. Your last settings are saved for uninterrupted convenience.

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.

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.

Easy to Install The door sensor chime and receiver are paired already,Just plug the receiver into standard outlet, tear the double-side adhesive tape of the entry alert chime and stick them to any door or window, The Magnetic Door Alarm is waterproof to IP55 and can withstand inclement weather. Ensuring perfect performance when working outdoors

Wide Application This montion sensor designed for home mailbox, driveway, gallery, gate, doorway, walking paths, door entrance, apartment, office, hotel, store and many other indoor places, not suitale for outdoor; the motion sensor door chime without waterproof function. Also for Kids safety & Caregiver Reminder for Elderly.

SIMPLE SET-UP This doorbell wireless plug in 2 receivers, just plug the mini receiver into a socket and fix the transmitter on a wall with the accessories provided; includes 2 screws, 2 anchor plugs, a key and double-sided adhesive tape

Classic wired chime that should be mounted vertically on a wall, ideally at 2 m high, for best sound coverage

Charming Antique Design Crafted in a vintage style reminiscent of traditional shopkeepers' bells, adding a nostalgic touch to your home d cor.

All-In-One PRODUCT Self-contained entrance alert with motion sensor and a built-in chime. Great product for smaller shops, stores and business offices, who wants a simple and effective heads-up when someone walks through a door or any monitored areas. If you prefer custom ringtones, check out our M6 PIR Custom Chime.

Upgrade Durability Our upgraded door alarm sensor boasts a robust 100,000-use lifespan after rigorous testing, outperforming competitors. With ultra-low-power design and replaceable CR2450 battery, it ensures lasting reliability for your doors. Never worry about frequent replacements!

IP55 waterproof doorbell button, needs 23A 12V Alkaline Battery.

WIRELESS DOORBELL BATTERY OPERATED JSIEEM flashing doorbell is powered by 3 AAA batteries (included) so no electric outlet needs to be occupied. The receiver can be mounted onto the wall by screws and it is easy to stand the doorbell on a desk. You also can take it with you to the backyard, basement, garage or bedroom.