Seeed Studio (101020013) RTC Board, DS1307, with Cable, 5 V

Product InformationAccessory Type: RTC DS1307 BoardFor Use With: Arduino & Raspberry Pi BoardProduct Range: -Product OverviewGrove - DS1307 RTC is based on the clock chip DS1307 and supports I2Ccommunication. It uses a Lithium cell battery (CR1225).Dimension is 130mm x 80mm x 10mmRTC counts sec, min, hrs, date of month, month, day of week and year withLeap-Year up to 210056byte, battery-backed, NVRAM for data storageI2C serial interface5V DC supplyProgrammable square-wave output signalAutomatic power-fail detect and switch circuitryConsumes less than 500nA in battery-backup mode with oscillator running