Barcode Scanner QR Code Reader Data Collector Inventory Scanner 100‑240V AC for Android 6.0 US Plug Item Type: Barcode Scanner Display Screen: 4.0in 800 x 480 high definition and bright IPS LCD screen. Battery: 1 x rechargeable lithium polymer battery 4000mAh, shipped with built in battery. Expansion Slots: 2 x SIM card slots, 2 x PSAM card slots, 1 x memory card slot, shipped without memory card. Audio: Stereo Amplifier Communication Interface: 1 x Micro USB, 1 x RS232, Type C. Performance and Parameters: CPU: ARM for Cortex A7 dual core at 1300MHz. RAM: 1GB. ROM: Standard 8GB Flash storage, memory card slot can support 64GB capacity expansion. Usage Environment: Working Temperature: -20 ℃ to 50 ℃ Development Environment: For Android studio. Wireless Communication: WIFI: Supports IEEE802.11b/g/n protocol. Mobile Data: Supports 4G, 3G, GPRS. Bluetooth: Supports Bluetooth 4.0+EDR, with a transmission distance of 5-10 meters. Barcode Collection: 1D Barcode Collection: 1D Barcode Scanning Engine: For Symbol SE955. Supports 1D Barcode Types: For UPC/EAN, Code128, Code39, Code93, Code11, Interleaved 2 of 5, Discrete. 2D Barcode Collection: 2D Barcode Scanning Engine: CCD Image Recognition NFC and for RFID: Working Frequency: 13.56MHz Protocol Standards: ISO14443A/B, ISO16593. Label Type: For read and write mode NFC analog card, mutual copying, mutual transmission, card reading, etc. Reading and Writing Distance: Within 2cm / 0.79in (approx.). GPS: GPS Positioning: Low power GPS chip. Encryption: PSAM Card: Supports financial system level IC card encryption, provides operational APIs and instruction sets, and complies with the ISO7816 standard protocol.