The stronger signal and louder ringtone can ensure that you can hear the doorbell anywhere in the house.Product description 1. Wireless doorbell design. You can freely choose your favorite ringtone and desired volume. 2. The stable signal and strong penetrating power ensure that you hear the doorbell in time and answer it in time. 3. The product prevents the accumulation of harmful dust, and the transmitter will not be damaged when it is wetted by external rainwater.Product attribute Color:black,white Plug: UK,EU,US Item Name: Wireless Doorbell Sound Volum: 5 Levels, 25-100dB Silent Mode: Support Transmitter Waterproof Level: IP55 Working Frequency: 433.92MHz280KHz Type: 1x Receiver Chime+1xTransmitter Button/2x Receiver Chime +1x Transmitter ButtonWarm reminder 1. Please remember that due to the lighting effects, the monitors brightness / contrast settings / etcs, there will be some slight differences in the color of the pictures and the actual items. Measured by hand, deviations of 1-2 cm are possible. 2. Please leave us a message if you have any questions. We will respond and offer you our best service.