Product Name: Doorbell Power Supply Voltage: AC100-240V Scope Of Application: Garden, Outdoor, Home, Villa Product Type: Remote Doorbell Product Material: PVC   Specifications: 1. Multiple Functions, Not Just A Doorbell, But Also A Pager. Babies Who Sleep Alone, The Elderly, And Pregnant Women Have Needs. Just Press It To Know And Protect Your Family 2. Safe Use, Energy Saving And Power Saving, Safe And No Hidden Dangers, Safe Circuit, Long-term Plug-in Use Without Heating 3. Sunscreen And Waterproof, Life Sunscreen And Waterproof, Effectively Prolonging The Service Life 4. Self-generated Power Generation, Finger Pressing Power Generation, Self-power Generation Without Batteries, Once You Press Your Finger, Kinetic Energy Is Converted Into Electrical Energy, And Wireless Signals Are Transmitted, So You Dont Have To Worry About Changing The Battery For The Doorbell Anymore 5. No Need For Wiring, The Doorbell Switch Is Connected To The Receiver Wirelessly, And Long-distance Signals Can Also Be Received. It Can Be Used Wirelessly Through Walls, With Strong Penetrating Power, One-to-one Signal Pairing, And No Need To Worry About Cross-wiring With The Next Door Package Included: 1*Doorbell