Advanced Wireless Technology: Experience the convenience of a wireless doorbell system with a robust range, ensuring you never miss a visitor or an urgent page. Emergency Features: Designed with the elderly in mind, this doorbell includes a vibration and flash alert system, making it an essential tool for those with hearing impairments or in need of immediate attention. Waterproof and : Built to withstand the elements, this doorbell is perfect for outdoor use with its fully waterproof casing, ensuring functionality in any weather condition. Easy Installation: Set up your new doorbell in minutes with no wiring required, making it a user-friendly solution for any home or professional setting. Multi-Use Functionality: Ideal for use as a nurse alert system or for anyone needing a reliable, quick way to signal for help in a home or healthcare environment. Due to batch variation, product appearance, color, and printing , but this not affect performance. Specifications:A:Blue Button Color:As Shown Material:ABS Package Contents: 2 * Buttons 1 * Receiver Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.