WiFi Programmable Watch 1.3 Inch Screen 2.4GHz ESP8266 Board 3dB Antenna Micro USB ESP8266 Watch for Development Testing Item Type: WiFi Programmable Watch Material: Acrylic, Printed Circuit Board Battery: Polymer Lithium Ion Battery (Inbuilt), Capacity: 1000mAh Power Supply Port: 2 x Micro USB(Simultaneous Use is Not Recommended) Antenna: External 3dB Antenna Strap: Silicone Strap Design: 3D Shell Atmega32u4: Added the Atmega32u4, Which Has Been Flushed Into for Boot Loader. You Can Program It Directly. Two Buttons (Numeric Pins 9 And 10) Can Be Used To Execute Different Commands. I Flashed A Demo Program. When The Usb Port Is Damaged And Connected To The PC, Pressing The DP9 Button Will Open The CMD Window. Press The DP10 Button And Notepad Will Open. You Can Reprogram It Through IDE Bridge Plate: This Watch Has An Empty Bonding Pad On The Back. Welding Them To Connect The ESP8266 And The Atmega32u4. For Example, If You Weld The Iic Pad, The Watch Might Turn Into A Wifi Duck