Xcortech X310 Pocket Chronograph Smallest Ever Chronograph Unit
Xcortech X310 Pocket Chronograph unboxing review by Airsoft Mike, the smallest Airsoft Chronograph Unit on the market.
Dimensions: 72mm x 47mm x 51mm
https://www.xcortech.com.tw/pdf/X310%20Manual-ENG%201.0.pdf