Features LONG ENDURANCE: Can support 602030 lithium battery, with 400mAh bright screen and a standby time of about 6 hours, fast charging, efficient and convenient. BUTTON OPERATION: The DIY module has 3 user buttons and a download button, convenient to write user programs and realize program download function. BATTERY MANAGEMENT: When inserting Type C data cable and connecting to the microcontroller, the lithium battery will only charge but not discharge, and stop when fully charged 1.28IN ROUND SCREEN: The watch development board has a 1.28 inch round TFT display and 240x240 high definition IPS screen, which is clear and intuitive. POSTURE SENSOR: This board is equipped with posture detection sensor, which can detect the posture of the watch and write programs to create rich functions. Specification: Item Type: Watch Development Board Material: PCB Board Size: Approx. 45 x 42mm / 1.77 x 1.65in Height After Installation: Approx. 14mm / 0.55in Dial Size: 1.28in Function: The watch development board uses for RP2040 microcontroller, a pair of for ARM Cortex-MO+ cores The clock frequency is 133MHz, providing sufficient integer performance There is a large 264KB RAM for the on board 4Mbyte serial interface of the storage device Users can develop a large number of applications using C or for MicroPython Package List: 1 x Development Board 1 x Watch Strap Package List 1 x Development Board 1 x Watch Strap