Characteristic of NTC temperature control: As the temperature rises, the resistance decreases exponentially.UART are using same port with the bluetooth module, can use UART communication with upper computer.Power board: With the function of activation by press button; There are lights on the board, 4 yellow lights, one red light, each yellow light represents 25% . The red light represents the status light of the power board, which is always onTouch LCD display screen: Can customize related or LOGO, support 485 and UART communication, only some parameters can be modified.485 rate communication with upper computer: 9600/ or 115200/CAN rate communication with upper computer: 250/ or 500/Material: plasticcolour: as shownPackage Contents:1 x AccessoryOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.