FEATURES / DESCRIPTION• ELECTRIC DOORBELL• BATTERY OPERATED• WIRING DESIGN - 1.8M WIRE PROVIDED• VOLUME ADJUSTMENT FUNCTION• LOW ENERGY CONSUMPTION• WEATHERPROOF PUSH BUTTON• FLASHING LIGHT INDICATOR• COMPLIES TO IMDA APPROVED POLYPHONY SOUND : 16BATTERY : 3 X AA (NOT INCLUDED) MODEL NO.: 035PACKING DIMENSION: L16.1cm x W3cm x H22cmWEIGHT: 0.15KG • Open battery cover of receiver, remove the mounting accessories and load 3 x 1.5V AA alkaline batteries (not included) in the correct polarity.• If there is a need, you can mount the receiver with screw on the wall through its fixing point.• The transmitter can be mounted either by adhesive tape or screws.• The wire which connects the transmitter to the receiver can be secured firmly by using clips.• Please replace teh receiver batteries when the melody volume turns low.