wireless doorbell

JX-371, JX-372: 1) Has the function of light reaction and very sensitive 2) Inducing distance: 4 - 5m 3) Volume: Lo/Hi 4) Material: ABS 5) Power: 3 x AA5 1.5V batteries 6) DC 4.5V-6V external power can also be used 7) Can be used as a visitor chime in such places as store, office, and home JXD-XS111, XS106, XS112,JXD-DS105: 1) Adopts the technology of using audio frequency to code and decode 2) working distance: 80 meters 3)32 kinds ofbeautiful music available as the ring 4) Stable and reliable performance 5) Can be easily installed and used 6) Different types available, used with DC power and AC power