Features: Uses high-quality imported probe, no omission. Hi-Fi speakers, with 38 music pieces. Home use, and use conveniently. Light in weight, easy to install and use. With PIR sensor, high sensitivity. Description: Used in banks, supermarkets, offices, convenience stores, shops, hotels, factories and homes and other places. Infrared induction design, provides convenience in your life. Increases pleasure and security. Specifications: Material: Plastic Voltage: AC110-240V Working range: Up to 70M Color: White Receiver size: 76*80*33mm PIR sensor size: 80*59*45mm Package size: 100*85*90mm Package content: 1 x Infrared Induction Doorbell Set Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. Please allow slight deviation in measurement due to manual measurement, thank you for your understanding.