Vito white wireless motion sensor doorbell Characteristics Brand: Vito EAN code: 6972538046277 Supplier code: 580080 Wireless doorbell with intelligent alarm sensor Volume: 70-80 dB (3 levels, low, medium, high) Sounds: 36 melodies Transmitter Voltage: 4.5V DC 3xAAA (Batteries not included) Receiver Voltage: 3V DC 2xAAA (Batteries Not Included) Possibility of using the doorbell even without a sensor Working frequency: RF 315 MHz / 433.92 MHz Detection angle: adjustable to 100° Sensing distance: 3-7m Receiver/transmitter range: 130-150 m (in open spaces White color