Instant purchase OK. Please refrain from purchasing if you haven't read the profile and product description. A follower discount of 100 yen is available. We cannot accommodate further price negotiations. Communication Port: Connects to a smart LiFePO4 battery via an RJ45 communication cable, allowing you to monitor battery information. Accurate Monitoring: Accurately reads battery information. Error Display: Errors are displayed on the LCD screen, allowing for immediate response. Easy Operation: Detailed system information can be displayed with the push of a button. The backlight brightness can be adjusted in 8 levels.