BJ-LY-012023 mobile phone back clip is a handheld smart device with built-in security unit. It is easy to operate and can be used with Android devices. The product has 5G/4G, Wifi, Bluetooth, one-dimensional and two-dimensional bar code scanning, modulated infrared, laser infrared, high-frequency RFID/NFC, RS485/RS232, power bank, and mobile hard disk. At the same time, it is built-in with hardware security unit, Bluetooth communication soft encryption, and adopts SM7 national secret algorithm, which realizes safe and reliable information transmission. It combines human body engineering and innovative design concepts. The color LCD display provides a good customer experience, meeting the needs of various industries in different application scenarios.