Features: 1. Support USB 1.1 or USB 2.0 communication; 2. Fully support operating systems such as WIN98, WINME, WIN2000, WINXP, VISTA, and WIN7; 3. It adopts a USB port for power supply, and the board is equipped with a 500mA self recovery fuse or safety resistor to protect the computer motherboard from accidental burning; 4. When programming the chip, the target system's own power supply can be used, or a programmer can be used to power the target board from the USB port. However, the target current should not exceed 500mA to prevent normal programming; 5. The completion of programming does not affect the program operation of the target board; 6. Support STC full series chip burning; 7. The programmer provides voltage output interfaces of 3.3V and 5V; 8. The speed is faster and more stable than parallel programming, making it more convenient for laptop users to use; 9. Adopting imported original chips, capable of high-speed and stable programming; Power range: VCC: 3-3.3VDC Current: 100mA   Technical Parameters: 1. Measurement range: 0.03-80 meters 2. Measurement accuracy (standard deviation): ± 1mm 3. Distance unit: m 4. Laser type: 635nm 5. Laser level: Level II,1mW 6. Spot diameter at distance m: 6mm@10m , 30mm@50m 7. Protection level: IP40 8. Working temperature: -20~+70 & 8451; 9. Storage temperature: -20~+80 & 8451;   11. Dimension (Length x Width x Height): 4.5 × 3.8 × 1.5CM