Feature:1. Intelligent Music Greetings: Featuring a smart music alert function, wireless doorbells create a welcoming ambiance in your shop, impressing visitors with personalized and pleasant greetings.2. Efficient and Energy Saving: Wireless infrared sensor doorbells utilize advanced infrared technology to accurately detect visitors, ensuring you never overlook anyone at your doorstep.3. Separate Design: With a separate layout for the infrared sensor and the music alert device, our doorbells offer enhanced flexibility in installation, allowing for optimal detection and sound transmission.4. Multiple Music Options: With a wide selection of music alerts to choose from, infrared motion sensor doorbells can cater to different settings and situations, ensuring a suitable experience for your customers or guests.5. Easy Installation: Infrared sensor doorbells are designed for effortless installation. You can easily adjust the volume and sensing range according to your requirements, making them suitable for shop stores of all sizes.Specification:Item Type: Infrared Sensor DoorbellMaterial: ABSSensor: Battery Type: Lithium battery Battery Model: 9V stacked battery x1Receiver: Battery type: Lithium battery Battery Model: AA batteries x2Shipped without batteriesTransmitting Distance: Approx. 100 meters/328ft (in an open unobstructed, interference free environment)Infrared Sensing Distance: Approx. 3-7 meters/9.8-23ft.Package List:1 x Sensor1 x Receiver1 x Connector1 x Base1 x English Instruction Manual Note: