Kosee Digital and Wireless LED doorbell with 52 different ring tones, range up to 300m, IP44 protected, Waterproof, Adjustable volume - Black (Electronics)
The battery for the transmitter is included. Since I have the socket variant, of course I do not need for the two receivers. The standard "Ding Dong" is in spite of the variety but much too long tones in my opinion the best signal. This als
