Correct

低倍

/ dī bèi / 
Strokes

Example

As a Noun

low power

1
Dī
低
bèi
倍
xiǎnwēijìng
显微镜

low-power(ed) microscope

2
Dī
低
bèi
倍
fàngdàjìng
放大镜

low-power magnifying glass; low-power magnifier