√USB to 9-pin serial cable Product features: easy installation, no external power supply, and physical drive required | √Applicable scope: This product can easily realize the conversion between the USB interface of the computer and the universal serial port, providing a fast channel for the computer without a serial port, and using this product is equivalent to turning the traditional serial port device into a plug-and-play USB device. | √ Supports various models of MCU, MCU STC download, LED screen control card, MODEM, and ISDN terminal adapter communication is suitable for computers or notebooks with USB ports. | √Application platform: Support USB1.0/1.1 specification, compatible with USB2.0 specification, support full-speed transfer mode 12MBPS, support Win98, 98SE, Me, 2000, XP, Mac OS8.6, vista, win7-32, 64-bit. | √Installation Instructions: 1. Run the driver CH340.EXE file to install 2. Connect the USB serial cable to the USB interface of the computer, and automatically install the driver 3. After the installation is successful, the COM port appears in the device manager

Ultra Bright & Portable: Illuminate your surroundings with the EC Buying USB Light, featuring a 5600K color temperature for crisp white light. This mini LED light is perfect for camping, travel, and can even be used as a laptop or keyboard light, providing convenience wherever you go. | Long-lasting & Energy Efficient: With its 3LED design and ultra small power consumption of 0.2W, this USB light offers high luminous efficiency and energy savings. Powered by any USB source, such as a power bank or computer, it can be fully charged and provide up to 100 hours of continuous illumination. | Compact & Versatile: The EC Buying USB Light is incredibly portable, making it ideal for on-the-go use. Whether you want to keep it in your wallet or hang it on your keychain, this mini nightlight is always within reach, ready to provide reliable lighting whenever you need it. | Convenient USB Power Supply: With a standard USB interface, this USB light can be easily plugged into any compatible device, including mobile power supplies, notebooks, netbooks, and desktop computers. The 5V power supply ensures reliable and consistent lighting performance. | Reliable & Durable: Rest assured knowing that the EC Buying USB Light is built to last. Its 2835 multi chip LED ensures long-lasting performance, while the efficient heat dissipation system prevents overheating. Say goodbye to pesky power consumption issues, as this USB light operates at a low working current of only 40mA.

High-performance USB to TTL module with original CH340G chip, ensuring compatibility and reliable data transmission. Never worry about incompatible drivers or different computers again | Convenient indication lights for power, TXD, and RXD, allowing you to easily monitor the module's operation without additional tools. Stay informed about the status of your product at a glance | CH340 Module, USB to TTL, USB to RS232, STC downloader | Compact module size of 55mm * 16mm and PCB size of 33mm * 16mm, allowing for easy integration into your projects without taking up excessive space | Wide compatibility with various operating systems including Windows 98/ME/2000/XP/Server 2003/VISTA/Server 2008/Win7/Win8/win10 32-bit/64-bit. Compatible with most devices and software environments.

HLK-LD1125H-24G is the high sensitivity 24GHz millimeter wave human presence detection radar module | compared with the traditional radar, with a certain range of presence detection, higher accuracy, not easy to miss | Different from the traditional radar by detecting the human body movement of large movements or small amplitude of body movements to determine the existence of the human body, the main feature of this module is based on the function of the traditional human body sensing radar, and at the same time has the function of detecting the accumulation of human breathing and other small amplitude movement, to determine the existence of the human body | The module can penetrate the non-metallic shell without opening. Common materials include plastic, glass, wood, ceramics, etc. | Frequency: 23.5G-24.5GHz; Modulation method: FMCW; Detection distance: 4m for sitting and 8m for movement; Scope: Hanging height of 3m, coverage radius of static human body detection>2m; Power supply: 3.3-5V; Current: 80mA; Output serial port level: 3.3V; Detection cycle: adaptive; Antenna half power angle: ± 22 ° (horizontal/vertical); Data format: serial port ASCIl output/high and low levels

LD2410C is a high sensitivity 24GHz human presence state sensing module. Its working principle is to use FMCW FM continuous wave to detect human targets in the set space | The module combines radar signal processing and accurate human body sensing algorithm to realize high sensitivity human body presence state sensing, and can calculate the target distance and other auxiliary information | In addition to being sensitive to the moving human body, this product can be sensitive to the static, inching, and sitting and lying human body that cannot be recognized by the traditional scheme | The product can output the detection results in real time and quickly, with the maximum sensing distance of 5 meters and the distance resolution of 0.75 m | Support GPIO and UART output, plug and play, flexible application to different intelligent scenarios and terminal products