Real-Time Clock Module with Battery CR2032 (2 pcs) --Features-- •manages all timekeeping functions: real-time clock counts seconds, minutes, hours, date of the month, month, day of the week, and year with leap year •31 x 8 battery-backed general-purpose RAM •simple serial port interfaces to most microcontrollers: simple 3-wire interface •TTL compatible: VCC = 5 V •single-byte or multiple-byte (burst mode) data transfer for read or write of clock or RAM data •low power operation extends battery backup run time: 2.0 V to 5.5 V full operation •uses less than 300 nA at 2.0 V •temperature range: 0 Degrees C to +70 Degrees C •battery: CR2032 (included)

--Overview-- The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. Whadda is a Premium Maker Brand by Velleman Group that produces electronics projects for enthusiasts.