Features 1.0.96in OLED: 0.96in OLED can display the time intuitively for easy reading, clear and convenient 2.Not Easy to Dry Joint: Using sophisticated manufacturing technology, not easy to dry joint, suitable for electronic equipment, electronic DIY 3.Connect to Other Device Modules for Development: Leading pins can be connected to other device modules for development, easy to operate 4.Five Buttons: Five way button connected to five pins is equivalent to five buttons, come with good performance 5.MicroUSB Automatic Programming: Come with microUSB automatic programming function, you can charge the battery and program the ESP8266 through the microUSB interface Specification Item Type: ESP8266 Clock Module Material: PCB Working Voltage: DC 5V(USB power supply) Battery Type: CR122C button battery Battery Capacity: 150mAh Purpose: Use the microUSB interface to charge the battery and program the ESP8266 Applicable Scenarios: Electronic equipment, electronic DIY Package List 1 x ESP8266 Clock Module 1 x Pin Header