Updated 09/25/2021 None of the buzzers work so I suspect the keypad/control box is out of order. Invest in something better. It takes away the headache, especially your restaurant really needs the device to work and nothing works. Now the old fashioned way, back to the numbers on the tables. Sad.------------------------------------------------ -------------------------------------------------- -- I don't usually give bad reviews when a product works as expected, but this one only gets 1 star. I bought it June 19th, now September 20th, five (5) tweeters are dead. They are fully charged, I can resync all but five of the other buzzers. They just don't respond anymore. I know there are 30 in this set and I have yet to find out if the other 10 actually work which I have never used before.
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