Features: brand new and high quality ESPRESSIF-ESP32 240MHz Xtensa single-/dual-core 32-bit LX6- microprocessor. It is great little keypad expansion board for the esp32. Modular interface: support UARTSPISDIOI2CLED PWMTV PWMI2SIRGPIOADCDACLNA pre-amplifier. There is no battery by default, you can buy it yourself if you need it. With high defination IPS ST7789V 1.14 Inch led display. Specifications: Chipset:ESPRESSIF-ESP32 240MHz Xtensa single-/dual-core 32-bit LX6- microprocessor FLASH:QSPI flash 4MB /16MB(optional) SRAM:520 kB SRAM Button:Reset Modular interface:UARTSPISDIOI2CLED PWMTV PWMI2SIRGPIOADCDACLNA pre-amplifier Display:IPS ST7789V 1.14 Inch Working voltage:2.7V-4.2V Power Supply:LUSB 5V/1A Charging current:500mA JST Connector:2Pin 1.25mm USB:Type-C Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-2mm error due to manual measurment. There is no battery by default, you can buy it yourself if you need it. Package includes: 1 X keyboard 1 X T-Display(4MB/16MB) 1 X USB Type-C 1 X Jst 2Pin 1.25mm Power cable