On Huawei monitors, if the menu won't open, press and hold the 5-way button while the monitor is on until a "lock/unlock" message appears.
If your ZQ-B20 has a 5-pin DIN connector labeled "CN2," do not plug a standard MIDI cable into it. The pinout is reversed, and you will short the 10V reference rail. You read it here first. zq-b20 manual
A 10mm open-end wrench and a flathead screwdriver. On Huawei monitors, if the menu won't open,
Be cautious of third-party “manual download” sites that ask for credit card information. The ZQ-B20 manual is a free document. On Huawei monitors
The B20 model offers 32x magnification for clear distance viewing.