Adjustable speaker for clear sound and mobile intercom functionality. Energy-saving design with long standby time. Wireless transmission range up to 300 meters in open areas. Simple and convenient installation with included double-sided tape. Operating temperature range of -20 degree Celsius to 55 degree Celsius for versatile climate suitability. Description: Introducing our wireless door bell, the perfect solution for your home or office. This device features an adjustable speaker that delivers clear sound and can also be used as a mobile intercom, providing convenience and security. With energy-saving technology and long standby time, you can rely on this doorbell for reliable performance. The wireless transmission range of up to 300 meters in open areas ensures that you'll never miss a visitor. Installation is a breeze with the included double-sided tape, and the doorbell is designed to withstand various climate conditions with an operating temperature range of -20 degrees Celsius to 55 degrees Celsius. Upgrade your doorbell system with our wireless door bell today! Item Name: Wireless Door Bell Material: ABS Features: Versatile, Convenient, Durable, Decoration, Fine Workmanship, Long-lasting Operating Temperature: -20 Degree Celsius to 55 Degree Celsius Wireless Distance: Up to 300 Meters Without Any Obstacles (50-100 Meters with Obstacles) Frequency: 467.6375MHZ Power Requirements: Indoor Chime Uses Rechargeable Battery; Outdoor Chime Uses 4 1.5V AAA Batteries (Not Included) IP Rating: Not Applicable Size Details: L: 10cm, W: 6cm, H: 1.48cm (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Indoor Doorbell 1 x Outdoor Doorbell (Without Battery) 1 x USB Cable 1 x Screwdriver 2 x Double-sided Adhesive 1 x User Manual