MTRTC001, Development Board, ChronoDot, DS3231SN Real Time Clock (RTC) Module, For Arduino

Every precrot needs a high-precision, temperature compensated real time clock module. You may know what time it is but does your project? The Chronodot is a high-precision real time clock module based on an industrial DS3231SN temperature compensated real time clock chip. Each Chronodot includes a fresh 3V lithium coin cell which lasts up to 8 years (assuming only the I2C interface is used.)Existing code for DS1337 and DS1307 RTCs can be used so it can be easily interfaced with your Basic Stamp, Arduino, or other popular controller or single board computer.Controller: Maxim DS3231SNFunction: Temperature-compensated RTC

• Accuracy: +- 3.5ppm at -40C to +85C (~1 minute/yr)
• Power Supply: 200uA (active), 840nA (timekeeping)
• PCB Size: 1.2 inches diameter
• Pin Spacing: 0.1 inches
• Header Spacing: 0.9 inches