Adjustable Warm Light: Shift the screen shade from white to amber to reduce eye strain at night. Waterproofing: IPX8 rated —safe for reading in the bath or by the pool (submersible in 2 meters of fresh water for 60 mins). Design: Thinner than the previous generation with a flush-front glass design. Connectivity: Dual-band Wi-Fi (2.4 GHz and 5.0 GHz) and Bluetooth for Audible audiobooks. Eco-Friendly: Made with 29% recycled materials and 100% recyclable packaging.