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 instead of using batteries, making it energy-efficient. Constructed from plastic, the wireless doorbell is eco-friendly and durable. It is waterproof and designed for long service life. The product measures 9.1 cm in length, 5.9 cm in width, and 2.5 cm in height. Suitable for use in homes, offices, shops, malls, and more, it can also function as an alert system for the elderly, offering multi-purpose functionality. Item Name: Wireless Doorbell Material: Plastic Plug Type: US Plug, EU Plug, UK Plug (Optional) Music Selection: 36 Songs Receiver Voltage: AC 110-240V Working Range: 300m Features: Sensitive, Waterproof, Lightweight Size Details: 9.1 cm x 5.9 cm x 2.5 cm / 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. Slight dimensional variations 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