AVSL 350.294 WIRELESS DOOR CHIME - Manual

To change the melody , move the jumper on the bell push from position 8 to
position 7
If you suffer interference from other units , you can change the channel by
fitting the supplied jumpers on J1 to J6 on the transmitter and receiver units .
The default is no jumpers fitted on J1-J6 as shown in the picture below