Features:

Wearable Barcode Scanner: This ring barcode scanner can freely rotate on your finger, which can make your work much easier. Anytime you want to collect data, just connect it with your device via Bluetooth or using the storage mode.
1 Mega Pixel Scanning Camera: The updated scanning technology with 1 Mega Pixel makes this scanning reading faster and more accurately. This scanner works with Bluetooth, 2.4GHz wireless and USB 2.0 wired mode.
Vibration Alert: When you need a quiet working environment, just set the volume off and the vibration function will lets you know if a barcode is detected.
Two upload mode: Instant upload mode + Storage mode. Scan and store up to 50000 barcodes in the built-in storage of the scanner, and then upload all the stored data to your device when you need.
Supported Both Digital and Printed 1D 2D QR Bar Code Symbologies: 1D Decode Capability: Codabar, Code 11, Code93, MSI, Code 128, UCC/EAN-128, Code 39, EAN-8, EAN-13, UPC-A, ISBN, Industrial 25, Interleaved 25, Standard 25, 2/5 Matrix 2D Decode Capability: QR, PDF417, Data Matrix, Aztec code, Maxi Code.
Instructions

[Updated Version] Tera Wireless Barcode Scanner Compatible with Bluetooth

Tera Wearable Ring Barcode Scanner Wireless Bluetooth 1D 2D QR