HONOR Watch 4 1.75-inch AMOLED GPS Smartwatch - Black Brand_Zyxel The focal length is apparently

The focal length is apparently 1

Dual output ports (1x USB & 1x Type-C)

and SMD Plus

while optional RS-232

HONOR Watch 4 1.75-inch AMOLED GPS Smartwatch - Black Brand_Zyxel The focal length is apparentlyHONOR Watch 4 1. 75 inch AMOLED GPS Smartwatch Black HONOR Watch 4 (Bluetooth) Time for a Better You Craft for All round Display. Key Features The HONOR Watch 4 features a 1. 75 inch AMOLED screen with a refresh rate up to 60Hz and a 390 x 450 resolution. One screen, all excitement. 1. 75" AMOLED 390 x 450 resolution 60Hz refresh rate Classy to perfection. The watch adopts the 6 series aluminium alloy middle frame with higher strength and finer