Kobo has been making e-readers for over ten years and have released a wide array of e-readers. They have always relied on selling accessories, such as
Kobo Sage Powercover
Review of Kobo Sage e-reader
Kobo Sage, eReader, 8” HD Glare Free Touchscreen, Waterproof, Adjustable Brightness and Color Temperature, Blue Light Reduction, Bluetooth, WiFi, 32GB of Storage
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Kobo Sage (Green eReader & SleepCover Bundle)
Kobo Sage review: This stellar e-reader has identity issues
Kobo Sage, eReader with PowerCover & Stylus Bundle, 8” HD Glare Free Touchscreen, Waterproof, Blue Light Reduction, Bluetooth, WiFi
Kobo Sage: In-Depth Review