** operating rang: 100meters
** frequency: 433 mHz
** transmitter: DC 1 x 12V 23A battery
** receiver: 3 x AA battery
** transmitter size: 3.5 x 7 x 2cm
** receiver size: 8 x 11 x 2.5cm
** 4 melody rings alternative
** good quality, clear bell sound, stable wireless
connection
** we can put your own sound into the bell sound
** we can make the panel shape your design
** we can make the panel design by yours
** each in double blister packing
