ITEM NAME:3PCS PCF8563 PCF8563T 8563 IIC Real Time Clock RTC Module Board For Ardui ZHP Descriptio n Feature: The PCF8563 RTC Board provides the real-time clock/calendar function, which can be driven by a battery on board and works independently even when the MCU is turned off. Low-cost, extremely accurate I2C real-time clock (RTC) More steady and precise than DS1302 or DS1307 Support I2C bus cascade (by pin, row seat docking method, which can use multiple I2C module) Wide voltage range: 1.0-5.5V Typical value: 0.25uA Output frequency: 32.768KHz, 1024Hz, 32Hz, 1Hz 4 kinds of real-time clock/calendar functions Package Included: 3pcs x PCF8563 RTC Board We offer you what you need! 3Pcs PCF8563T module clock.3Pcs PCF8563T module clock. 3pcs x PCF8563 RTC Board. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted. We'd like to settle any problem in a friendly manner.