Adopting a fashionable design with convenient touch operation, this doorbell chime is easy to install and use. This product is energy-efficient and provides 52 chime options for your selection. Constructed from metal and plastic materials, it ensures durability. Dimensions: 6.5 cm (L) x 4.5 cm (W) x 3 cm (H). Suitable for use in living rooms, bedrooms, bathrooms, and other areas. Item Name: Doorbell Chime Material: Plastic, Metal Maximum Volume: 110 dB Power Consumption: 10 mW Transmitting Power: 0 dBm Plug Type: US/UK/EU Plug Working Frequency: 433.92 MHz +/- 280 KHz Operating Voltage: AC 90–250V Sensitivity: -110 dBm Notes: Due to differences in lighting and screen settings, the actual color may vary slightly from the images. Please allow slight dimensional variations due to manual measurement. Package Includes: 1 x User Manual 1 x Doorbell Chime