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

Product Information Accessory Type: RTC DS1307 Board For Use With: Arduino & Raspberry Pi Board Product Range: - Product Overview Grove - DS1307 RTC is based on the clock chip DS1307 and supports I2C communication. It uses a Lithium cell battery (CR1225). Dimension is 130mm x 80mm x 10mm RTC counts sec, min, hrs, date of month, month, day of week and year with Leap-Year up to 2100 56byte, battery-backed, NVRAM for data storage I2C serial interface 5V DC supply Programmable square-wave output signal Automatic power-fail detect and switch circuitry Consumes less than 500nA in battery-backup mode with oscillator running