Real-Time Mailbox Alert Sensor

The mailbox alert sensor detects mail delivery and transmits real-time notifications to your smartphone. It measures 6.5 x 3.2 x 1.8 cm and weighs 42 g, with a compact design suitable for all standard UK mailboxes. Constructed from durable ABS plastic and IP54-rated for weather resistance, it operates on two CR2032 batteries (included) with an estimated 12-month battery life under typical UK usage conditions. The sensor uses Bluetooth 5.0 and low-energy radio frequency for reliable communication up to 30 m in open air (range reduced by metal mailbox walls or thick masonry). It integrates natively with Apple HomeKit and supports Matter-over-Thread for future-proof compatibility with Alexa, Google Home, and other certified smart home platforms. Ideal for monitoring letterbox activity in detached houses, flats with shared post rooms, or rural properties where parcel theft is common.