UT658 series USB testers are used to inspect USB chargers and portable power source of electronics products. UT658 series can output voltage, current, and power. Users can use these devices to monitor charging status of  any USB powered device.

UT337A is a portable carbon monoxide meter with wide detection range, short response time, long term stability, and long service life. It provides many functions such as CO concentration display, maximum value, average value, audible and visual alarm, temperature display, etc. It is suitable for carbon monoxide detection in residential homes, restaurants, indoor parking lots and gas heating facilities.

Features:

1. High-sensitivity electrochemical sensor

2. Light and sound alarm

3. Sensor self-check

4. Battery powered, 20 minutes automatic power off

5. Portable

6. The alarm value of CO can be set

7. Maximum value

8. Temperature

9. LCD backlight