I purchased this from a certain coffee shop about six months ago, but I haven't used it much as I mostly use a different scale. It's a TYPE-C rechargeable scale. There is no instruction manual, but it's available on the manufacturer's website. Here's the product description: A scale that can simultaneously measure "coffee grounds," "hot water," "coffee grounds:hot water (brew ratio)," and "extracted coffee." You can measure the ratio of coffee and hot water to find your favorite recipe. Even if you know the amount of coffee grounds and hot water, the amount of extracted coffee changes as the filter and coffee grounds absorb water. The matrix M1 Pro coffee scale can measure the extraction amount simultaneously with the brew ratio. Product Details ・Size: 130 x 150 x 23.5mm, Box size: 180 x 160 x 55mm ・Weight: 300g / 500g including box ・Materials: ABS resin, silicone ・Included: Main unit, silicone pad, diatomaceous earth pad ・Measurement range: 0.5-2000g ・Voltage: 5V-2A ・Power: Type-C charging (built-in 1000mAh lithium battery) ・Measurement units: g, ml, oz ・Country of manufacture: China For search purposes, I'm using Acaia. Hario, Melitta, Kalita, Timemore