Check the listing for details. Temperature and Voltage Data Monitor via Internet LAN. Condition: New. Listed at 82.00 USD. Require Power Supply DC 12V/No software needed, can use general Web Browser to access to the board. Measurement -55 to 125 'C accuracy 0.1'C by Digital Sensor DS18B20 4 Channel for Temperature measurement /4 Channel for Voltage measurement 0-30VDC. PCB size 9.2 cm x 7.8 cm / Connect internet via LAN cable IP : 192.168.1.99 ( No need Driver ) CH-025 Curve Tracer Adapter CH-026 Door/Window Open Alarm 10-240 seconds CH-012 BJT Transistor Curve Tracer Plus AC/DC with Regulator Power Dual Supply "Double Pack" CH-003 HHO High-Frequency PWM DC Motor Speed Controller 30A max Plus Soft Start 12-30VD CH-029 Pre Microphone XLR upgrade board for MIC capsule XLR Mic CH-010 Car Ceiling Light Dimmer Delay Off Timer 7-14s for Lamp / LED Temperature and Voltage Data Monitor via Internet LAN CH-024 Function Generator Sine Triangle Square Wave 0.5Hz-100kHz Unassembled Kit for Lab CH-017 Delay On Timer 1-3 seconds for Car Amplifier System 12V / 5A or Car Light CH-018 Cycling or Repeat Timer 1.5-180 minutes ON-OFF 12VDC/30A Heavy Duty 110V/240VAC