N65Q-1T1 Wireless Door Bell Home Elderly Care Flashing Adjustable Volume Doorbell,1 Transmitter+1 Receiver - EU Plug/Black •55 Ringtones to Choose: After the power is turned off,the set ringtone can be locked,and the set ringtone is still the same as before after the power is turned on •Strong Signal: It can penetrate 3-4 walls and wireless range up to 300 meters in the open area,great for large houses including villas,apartments,offices,shops,warehouses,etc. •Upgraded Metal Speaker: With clear and loud sound,produces pleasant sound without noise •5 Levels of Volume Adjustment: Support 5 levels of volume adjustment,can also be muted •Colorful Flash Design: The receiver has a flash design to better attract attention •Easy to Install: The transmitter is powered by a battery,and the receiver has a built-in plug to get power,no need for wiring,easy to install Specifications: •Receiver voltage: 110-260V/50-60Hz •Transmitter battery: 1 x 12V 23A alkaline zinc-manganese battery (included) •Ringtones: 55 polyphonic music •Operating frequency: 433.92MHz ± 280KHz •Operating temperature: -30 to +70℃ •Receiver size: 82 x 82 x 22mm •Transmitter size: 60 x 60 x 15mm Package included: •1 x Transmitter (with Battery) •1 x Receiver •1 x English User Manual