Main Fetures1, Versatile: Interfaces such as PS2, RS232, USB, USB-COM, etc. are available. 2, The reading distance can be up to 20cm highand the information in the barcode can be read quickly. 3, Compact, lightweight, ergonomically designed and comfortable to feel.4, Excellent durability: Dust-resistant and water-resistant IP54, while withstanding 1.5-meter drops to the cement floor, ensuring reliable operational performance in the event of liquid splashes, drops and collisions in everyday use. 5, Safe and reliable design: CE Electrical Safety, EMC Electromagnetic Compatibility, RoHS, CLASS 1 Laser Safety Level, Light Safety, etc.Option 2H4W 2D Wireless Barcode Scanner2 Mode connection operation instruction1) 2.4G Receiver Wireless Connection2) USB Cable Wired Connection