Feature:1 Made of nice material, sturdy and practical2 Small size, beautiful appearance, exquisite association of components3 Stable performance4 The wiring diagram is simple to understand and simple to use5 Wide fluctuate of applications, compatible for wise home, home automation, industrial control equipment recent and voltage tracking and so on Parameters:Power delivery voltage: DC 8-25V (12V recommended)Working current: 8-13MAMODBUS RTU protocol: 03 read command, 06/16 write commandSerial baud rate: 1200 2400 9600 (default) 19200 38400 57600 115200, N/E/O, 8,1By replacing the RS485 address, a maximum of 247 modules would be cascaded (more than sixteen please use R485 repeater) measurement range: 0~1A, 0~2A, 0~5A It is recommended to pick a smaller edition in the vary that meets the measurementVoltage measurement range: 0~30VMeasurement accuracy: 1% If the studying price differs an excessive amount of from the actual value, recalibrate Attention:This product is used to collect small latest indicators from time to timeWiring diagram:Only 0-30V voltage indicators are measuredOnly measure 0/2/5A latest sign (voltage of recent sign can be DC 0-110V) Package included:1 x Multifunctional RS485 Ammeter & Voltmeter 0-30V Voltage & 0-5A Current Measurement Module Modbus RTU