UART / TTL / RS232 / RS485 serial port to USB keyboard protocol CH9328 HID IO S$ 18.67 to S$ 20.23S$ 20.29
488nm 5V Sky Blue Color Adjustable Laser Module Research Experiment Light Source S$ 111.31 to S$ 111.38S$ 121.07
650nm 150mW 200mW Red Adjustable Focus Laser Dot Visible Light Module Locator S$ 49.99 to S$ 71.86S$ 54.34
635nm 30mW-50mW 100mW-185mW Red Adjustment Focus Laser Dot Light Module Locator S$ 72.64 to S$ 114.04S$ 123.96
650nm 20mW 30mW 50mW 80mW 100mW Red Adjustment Focus Laser Dot Module Locator S$ 33.59 to S$ 54.68S$ 59.43
532nm 545nm 555nm 571nm 593nm Yellow Green Light Source for Science Experiment S$ 56.39 to S$ 390.00S$ 423.91
635nm 30mW-50mW 100mW-185mW Red Adjustment Focus Laser Line Light Module Locator S$ 38.27 to S$ 105.45S$ 114.62
635nm Line Red Light Adjustment Laser Module Locator w / Power Supply + Bracket S$ 78.11 to S$ 127.32S$ 138.39