Floureon® Double waterproof Doorbell portable wireless control with 38 Melodies and LED light waterproof electronic Carillon Bell Home Blanc hotel apartment house etc (Kitchen)
At least for now. Two receivers with 38 melodies and an indicator light (allow 4 Double A batteries for these two elements) is a real plus. The doorbell button already has its battery and is easy to install (rather than double-sided screws I think).