Ring Barcode Scanner 1D 2D QR Wireless Rotatable Instant Upload Storage Wearable Barcode Reader for Computer Phone Item Type: Ring Barcode Scanner Material: ABS Optical System: CCD Sensor Light Source: Red Visible Light, 632nm Wavelength  Resolution:1500 Resolution: >4mil/0.1mm(PCS90%,CODE39) Decoding Speed: Up To 300 Times/Second Depth Of Field: 70mm to 400mm Reading Mode: Manual, Always On, Sensing, Flashing for Reading Prompt Way: LED Indicator Light, Buzzer, Vibration Induction Transmission Distance: 2.4G: 150 Meters / 164 Yards. BT 4.2: 50 Meters / 54.7 Yards(Open Environment) Battery Type: Lithium Battery Battery Capacity :450mAh (Battery Included) Continuous Scanning Time: ≥2.5 Hours Reading System: UPC A, UPC E, EAN 8, EAN 13, ISSN, ISBN, Code128,GS1 128, Code39, Code93,Code32,Code 11, UCC/EAN128, Interleaved 2 of 5, Industrial 2 of 5, Codabar (NW 7), MSI Plessey, RSS, China Post, etc. Communication Mode: Wireless 2.4G, Wireless BT Operating Temperature: 0℃ to 50℃ Storage Temperature: Minus 40℃ to 70℃ Operating Humidity: 5% To 95%(No Condensation) Drop Test: 1.5 Meters / 4.9ft