The Panasonic Eluga Ray 500 was announced in 2017, September With 5.0 inches, 68.9 cm2 (~67.0% screen-to-body ratio) IPS LCD, Powered by Mediatek MT6737 (28 nm) and running watchOS 4.0, upgradable to 8.7, the device delivered smooth performance and multitasking capabilities. while the Li-Ion 4000 mAh, non-removable ensured long-lasting usage.