Amazon Kindle Paperwhite E-Book 32GB

Display: 6.8" Paperwhite screen with built-in light, 300 ppi, optimized front technology, and 16-level grayscale.
Wireless charging (Qi charging pad required, not included)
Auto-adjusting front light
Device storage: 32 GB
Battery life: Up to 10 weeks on a single charge, based on half an hour of reading per day with wireless off and screen brightness 13. Battery life will vary based on lighting settings and wireless usage. Streaming audiobooks via Bluetooth will reduce battery life.
Charging time: Fully charges in about 5 hours using a USB connection to a computer. Charging time is less than 2.5 hours with a 9W USB power adapter (not included). Fully charging time is less than 3.5 hours with a compatible 10W Qi wireless charging pad (sold separately).
Wi-Fi connectivity: Supports 2.4 and 5 GHz networks with encryption via WEP, WPA and WPA2 with password authentication or Wi-Fi Protected Setup (WPS). Connection to ad hoc (or peer-to-peer) Wi-Fi networks is not supported.
Supported formats: Kindle Format 8 (AZW3), Kindle (AZW), TXT, PDF, unprotected MOBI, PRC native, HTML, DOC, DOCX, JPEG, GIF, PNG, PMP after conversion, Audible audio format (AAX)