1 Reader. battery: 2100 mAh. Speed: 380 mhz. Upper view: 30 ° -70 °, lower: 50 ° -70 °, left: 50 ° -70 °, right: right: 50 ° 50 ° -70 °. working temperature: -10 ℃ -40 ℃/relative humidity: 5% to 95% without 95% Electronic book format: EPUB, PDF, TXT, FB2, PDB.
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