Possibly the Sony DPT-RP1/B 13” Digital Paper meets your requirements best. It is just for reading technical pdf files, nothing else. No frontlight. No eink device with 13" eink screen comes with frontlight. If you absolutely need inbuilt lights, you are better off with a (anti-glare) tablet.
Next best is Boyue Likebook Mimas, 10.3" eink screen, frontlight, bluetooth, wifi, 3.5 mm audio jack, microSD card slot, Android 6. I do not know of any other device with 10.3" screen that has a frontlight.
Last edited by mobama; 01-27-2019 at 02:27 PM.
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