EXT4 
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Front view
Main view
EPD Extension Kit Generation 4 (EXT4 Kit) is an extension board to connect with your product to kick-start Bluetooth Low Energy (BLE) applications with iTC driver type of EPDs.
The EXT4 kit supports driving 1.52“ to 3.7” EPDs with iTC driver IC. It has an onboard driving circuit to easily develop the user’s EPD applications.
It also has additional peripherals for more powerful and wider applications such as on-board thermometer, hygrometer, accelerometer, and NFC.