Features High Quality 5V 1-Channel Relay Module: This module offers high-quality performance with a 5V power supply and 1-channel bistable self-locking relay, ensuring reliable and efficient . Convenient Trigger Control: Easily activate the relay by clicking the trigger port to pull it in and hold, and click again to disconnect, providing convenient and intuitive control. and Long Service Life: Constructed with high-quality materials, this relay module is and has a long service life, ensuring lasting reliability for your applications. High Accuracy and Strong Stability: With high accuracy and strong stability, this relay module is easy to install and use, delivering and reliable performance for various applications. Safe Low Pulse Trigger: The trigger mode is a low pulse trigger, providing a more convenient and safer for your peace of mind. Features: 1、Wide range of voltage measurement from 60~500V. 2、The meter can also measuring current up to 100A. 3、The meter can operate normally at the temperature between 0~50℃. 4、Light weight and small size,portable and can be carried with. 5、High accuracy of the meter which has a low error of +-2%. Specification: Features: Wide range of voltage measurement from 60~500V. The meter can also measuring current up to 100A. The meter can operate normally at the temperature between 0~50℃. Light weight and small size,portable and can be carried with. High accuracy of the meter which has a low error of +-2%. Specification: Voltage:60~500V Current:0~100A Environmental Temperature:0~50℃ Weight: 42g/1.48oz Measuring Error:+/-2% Color:White/Red/Yellow/Blue/Green(Optional) Package List: 1 x 2 in 1 Indication Light Package List