E4 Pro Portable E-Ink E-Reader & Music Player, Eye Friendly E-Paper Screen for Reading, Lyrics Display & Music Playback

How it works in production

<p>E4 Pro is an exquisitely crafted ultra‑thin portable magnetic music e‑reader. As one of the world’s early full‑featured metal ultra‑thin magnetic e‑readers and the first small‑size e‑reader supporting full‑format document browsing, it integrates a magnetic ultra‑thin chassis, E Ink screen, touch control, physical buttons, and adjustable warm‑cool eye‑care front light into one unit.</p><p>Packed in a compact body with a 4.5‑inch display, it is only 5.8 mm thin and weighs merely 84 g. Designed with a narrow bezel and rounded corners, it can be easily attached magnetically to the back of your phone for effortless carrying. It meets diverse needs including reading, audiobook listening and audio playback. Whether you are commuting, taking an afternoon break or reading quietly before bed, it immerses you in reading during fragmented time and delivers a gentle eye‑friendly experience.</p><p>The display surface uses etched glass with a matte finish and anti‑glare property for more natural and comfortable reading. It comes in four elegant color options: Night Black, Sky White, Bamboo Green and Coral Orange, simple yet textured. The monochrome screen adopts E Ink Carta technology with a resolution of 480×800 at 219 DPI. It features dual‑color front reading light with adjustable warm and cool color temperature and 16 brightness levels, offering even and soft illumination. Equipped with a capacitive touchscreen, it provides smooth and responsive control.</p><p>It is powered by an embedded dual‑core Cortex‑M33 @240 MHz CPU plus 2.5D GPU, running the RTOS system. It has 16 MB RAM and supports TF/SD card expansion up to 512 GB. It charges via Type‑C port and houses a 3.8 V, 910 mAh battery with a maximum standby time of 15 days.</p><p>It supports BT5.3 Bluetooth connection, built with a 1 W box speaker and noise‑reducing digital microphone.</p><p>The device supports more than 20 interface languages including Simplified Chinese, Traditional Chinese, English, German, French, Spanish, Italian, Russian, Japanese and Korean.</p><p>It also supports JPG and PNG image viewing, plus calendar, clock, alarm and voice recording functions.</p><p>TTS text‑to‑speech audiobook is available.</p><p>MP3 playback is supported, allowing you to read while listening to music with lyrics displayed. Audio formats compatible: MP3, WAV.</p><p>It directly decodes and opens e‑books in TXT, EPUB, FB2, MOBI, AZW3 and CBZ formats, and supports importing custom fonts.</p><p></p>