Features:
1. Very small, probably the smallest light meter in the world
2. Very versatile: AV, TV, EV modes all available, exposure compensation setting available
3. Very affordable, cheaper than other light meter modles that are available recently
Specifications:
Metering Angle: 30 degrees
Aperture Range: F1-F64
ISO: 6-6400
Shutter Speed: 8s -1/2000s
Dimension: 27mm*30mm*13mm
Battery Capacity: 120mAh
Battery Life: 20hrs non-stop
Shoe Bracket Position: adjustable (in the middle by default)
Review:
https://cameractive.shop/blogs/news/can-it-get-any-smaller-a-review-on-the-v102-meter
Video user manual: