The wireless doorbell offers high performance with high sensitivity and a long operating range. It rings immediately when the transmitter is pressed lightly, generating electricity through a motor mechanism without the use of batteries, making it energy-efficient. Constructed from plastic, the doorbell is durable and environmentally friendly. It features a waterproof design for extended service life. The product measures 9.1 cm in length, 5.9 cm in width, and 2.5 cm in height. Suitable for various settings such as homes, offices, shops, and malls, it can also function as an alert system for the elderly, offering multi-purpose use. Item Name: Wireless Doorbell Material: Plastic Plug Type: US Plug, EU Plug, UK Plug (Optional) Music Selection: 36 Songs Receiver Voltage: AC110-240V Working Range: 300m Features: Sensitive, Waterproof, Lightweight Size Details: 9.1cm x 5.9cm x 2.5cm / 3.58" x 2.32" x 0.98" (Approx.) Notes: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. A slight variation in dimensions may occur due to manual measurement. Package Includes: 1 x Transmitter 1 x Receiver 1 x Double-sided Tape 2 x Screws 1 x Sticker