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Mini door @@[[27A::DESCRIPTION::BEGIN]] Name Wireless doorbell Color White, black Plug US standard/Japanese standard, British standard, European standard Specifications 1 to 11 transmitters + 1 receiver Waterproof rating Transmitter waterproof rating is IP55 Operating temperature -30℃Up to +30℃ Working frequency 433.92MHz±280KHz Receiver Voltage 110-260V/50-60Hz wide voltage Transmitter battery 12V23A alkaline zinc-manganese battery shipped with battery included Product Certification CE, ROHS, FCC, PSE, TELEC, Design Patent Ringtone 55 tracks to choose from, learning code, can be customized Volume 0-110 decibels, 5 levels adjustable, with silent and flash-only mode Packing List 1x transmitter, 1x receiver, 1x double-sided tape, 1x screwdriver, 1x screw pack, 1x battery with built-in insulation, 1x neutral manual available in English, Japanese, German, French, Italian, and Spanish, 1x neutral paper box, 1x neutral outer box Specifications Size Weight Transmitter 3.5x8.5x1.5cm 31.5g Receiver 8.2x8.2x3.1cm 85g Leather box 10.3x8.5x7.4cm 182g Outer box 45.5x39.5x23.2cm, 50 sets/carton 10.1kg @@[[27A::DESCRIPTION::END]]