ST-820非接觸/激光測距儀是一款功能強大的測量工具，廣泛應用于建筑、裝修、工程測量等領域。它采用先進的激光技術，能夠快速、準確地測量距離，測量范圍可達2英尺至50英尺（約15米）。該設備配備易讀的LCD顯示屏，可清晰顯示測量結果，支持多種測量單位，如英尺、英寸和米。

ST-820具備多種實用功能，包括面積和體積計算、水平面積及體積測量拓展、記憶功能和追蹤有效模式。它還設有電力不足指示燈，提醒用戶及時更換電池。此外，該設備重量僅為100克，尺寸為205毫米（長）×62毫米（寬）×55毫米（高），便于攜帶和操作。

ST-820的生產廠家為臺灣先馳，其產品以高品質和良好的用戶體驗著稱。該設備由多家經銷商銷售，如深圳市源恒通科技有限公司，價格約為530元。

The ST-820 non-contact/laser rangefinder is a powerful measuring tool widely used in construction, decoration, engineering surveying, and other fields. It uses advanced laser technology to quickly and accurately measure distances, with a range of 2 feet to 50 feet (approximately 15 meters). The device is equipped with an easy-to-read LCD display that can clearly show measurement results and supports multiple measurement units, such as feet, inches, and meters.

The ST-820 features multiple practical functions, including area and volume calculation, horizontal area and volume measurement expansion, memory function, and effective tracking mode. It also has a power shortage indicator light to remind users to replace the battery in time. In addition, the device weighs only 100 grams and has dimensions of 205 mm (length) × 62 mm (width) × 55 mm (height), making it easy to carry and operate.

The manufacturer of the ST-820 is Taiwan Sentry, known for its high-quality products and good user experience. The device is sold by several dealers, such as Shenzhen Yuanhengtong Technology Co., Ltd, with a price of around 530 yuan.