1、APPLICATION: DIY clock kit for mounting to 4 digit electronic clock. Widely used in schools to help students learn basic mechanical and electronic skills 2、ACCURATE TIME: Second correction function, can switch to display seconds or sub interfaces independently. Accurate travel time within ±1 second per 24 hours 3、SUPPORT FUNCTION: The production kit has hourly timekeeping function, and supports the hourly timekeeping from 8: 00 To 20: 00 (can be turned on or off) 4、MULTIPLE FUNCTIONS: 2 way alarm clock, support 2 alarm clock settings. Power off memory function, the power on time is still accurate after power off 5、CLOCK PARTS: This is DIY electronics fabrication kit, this soldering project requires basic electronics knowledge and hands on skills 1 x Digital Clock Kits Item Type: Digital Clock KitsMaterial: ABSPower Supply Voltage: 3-6VPCB Size: Approx. 52 x 42mm / 2.05 x 1.65in