This is a perpetual alert miniature clock module with 3 operation keys. Sized as 35 x 18.4 mm, it has four daily alarms built-in. The photo indicated is in 24-hour version, but 12-hour version is available too. It is possible to select one minute regular audible alarm or perpetual audible PSEA (power saving endless alert) alarm. Due to the significant power saving by applying PSEA alert circuit, this perpetual alert clock module is good to be applied to battery operated devices, such as pill reminder, job reminder, maintenance reminder to provide endless audible alarm unless confirming key is depressed.
A piece of LR44 button cell battery is mounted on the backside normally. But if necessary, instead of battery power, people can connect to external power source too.
The keys are operated friendly. There are three keys, "mode", "set", and "adjust". Press "mode" key to switch normal display into each channel of alarm. Apply "set" to enter the set mode of current display mode, and then press "adjust" key to change the reading. Various options of key combination are available upon request. It provides engineer the flexibility of designing a 2 keys, 3 keys, 4 keys, or 5 keys product. The sophisticated combination and options of output poles allow designer to do various applications.
We are a professional manufacturer of Countdown Clock and Lifetime Meter, in addition, we also offer LCD Clock Module with excellent quality.