Xiaomi  Mi Watch (Black) | Waterproof (5ATM) | Up to 50 meters depth for 10 mins | AMOLED 450 nits (peak) | 1.39 inches 12.5 cm2 (~51.2% screen-to-body ratio) | Resolution : 454 x 454 pixels 1:1 ratio (~326 ppi density) | Proprietary OS | Wi-Fi 802.11 b/g/n | Li-Ion 420 mAh non-removable| Wireless charging | Elegant Black Fashion Silver Navy Blue Beige |