Product Name: Wireless Home Digital Door Bell 50m Range Model NO.: Door Bell2019 Power Source: Battery Waterproof: Not Waterproof Brand: Na Application Scope: Office , Home ,Store,etc Wireless Video Doorbell Function: Remote Control Unlocking Active Doorbell: 110V~240V Wireless: Wireless Peephole: Without Peephole Automation: Non Automation Talkback Type: Speech but Not Visible Style: Digital One to One Type: Remote Doorbell Product Name: The Best Long Range Electronic Ring Bell Waterproo Model Number: Vt-9715 Certificate: Ce FCC RoHS PSE Ring Tone: Double Dingdong Remote Control Distance: 50m(for Free) Transmission Frequency: 433.92MHz Transmitter: 1 PC 12V(23A)Battery Receiver: DC 3V(1.5V AA*2 Battery) Color: White Supply Ability: 1000000 Piece/Pieces Per Month Wireless Door Bell Trademark: NA Transport Package: Carton Specification: