Enhance your security access control system with this External Wired Doorbell, designed to provide a clear, loud, and pleasant "ding dong" ringing sound. Crafted from premium ABS plastic, this doorbell offers excellent durability with anti-oxidation and anti-discoloration properties, ensuring long-lasting performance and reliability for your alarm needs. Key Features: · Clear and Distinctive Ringing: Emits a soft yet loud "ding dong" sound that effectively alerts you of visitors or alarms. · Durable ABS Plastic Construction: Made from high-quality ABS material resistant to oxidation and discoloration, guaranteeing maximum durability and long-term use. · High Reliability and Superior Performance: Engineered to deliver excellent alarm function and consistent operation for enhanced security. · Flexible Installation Options: Easily installed using either the wall-mounted method or double-sided adhesive tape (adhesive tape not included), providing convenience and adaptability to different environments. Specifications: · Material: Premium ABS Plastic · Color: White · Operating Voltage: 12V DC · Operating Current: 20mA · Operating Temperature Range: -10℃ to 45℃ · Relative Humidity Range: 40%RH to 90%RH · Installation Modes: Wall-mounted or double-sided adhesive tape · Wire Connection: Red = +12V, Black = GND, Green = BELL1, Yellow = BELL2 · Size: Approximately 86 x 86 x 25 mm (3.4 x 3.4 x 1.0 inches) · Package Weight: Approximately 83g (2.9oz) Package Includes: · 1 x External Wired Doorbell This wired doorbell combines robust build quality with convenient installation methods and reliable performance, making it an ideal choice for enhancing your security access control system with clear and effective alerts.