ITEM NAME:PCF8563 PCF8563T 8563 IIC Real Time Clock RTC Module Board Good than DS3231 F4W6 PCF8563 PCF8563T 8563 IIC Real Time Clock RTC Module Board Good than DS3231 F4W6 Type: Voltage Regulator.1 Module. Dissipation Power: 1. size: 4.5 4.5 2.6cm. Application: Computer.