Uni-Com Flashing Door Chime Whether you need an extra little reminder if you're deaf or hard of hearing or need to switch the chime off while they baby's asleep, this flashing door chime is the ideal solution. This portable chime comes with eight melodies to choose from and an ultra-bright, flashing LED that both go off when the doorbell rings, so you'll be alerted even if the sound is switched off or cannot be heard. Operating distance: 150m 8 melodies Sound output: 88dB Connects up to 4 bell pushes Includes: Battery-operated flashing door chime and bell push Requires 2 x C batteries (available separately)