DS3604-868M IoT E-Ink Display DS3604 is a reflective e-paper display that offers readability and flexibility. The 4.2-inch active area contains 400 x 300 pixels and features 1-bit black/white/red full display capabilities. DS3604 supports display of up to 150 languages and other modules such as images or QR codes. High capacity, ultra-low power batteries provide long battery life of up to 5 years. Radio standard