Eyoyo Portable Wearable Ring Barcode Scanner 1D Reader Mini Wireless Barcode Scanner 380mA Battery Compatible for iOS/Android 4.0+/Windows/Mac OS Powerful new generation mini barcode scanner with small size and charming appearance. Independent Intellectual Property Rights Three scanning modes: continuous mode, manual mode, auto close mode Feedback by LED indicator and buzzer Built-in 512K memory can store more than ten thousand barcodes