Tera Small Laser Barcode Scanner Wired & Wireless USB 2.4G Bluetooth Compatible Wireless Handheld Scanner Model: 5200C I'm sorry. I've lost the instruction manual and the lanyard. All I have is the main unit and the USB charging cable. The operation is completely fine. It might be hard to see, but the red laser is also emitting. I haven't used it much, so it's clean. Please consider purchasing it.