TF Card System: Android 10.0 WLAN: Dual-band 2.4GHz / 5GHz, Supporting IEEE 802 a/b/g/n/ac protocol WWAN: 2G: GSM(850/900/1800/1900MHz); 3G: WCDMA(850/900/1900/2100MHz); 4G FDD: B1/B3/B4/B7/B8/B12/B20,TDD:B38/B39/B40/B41 BT: Support Bt 5.0'BLE Transmission distance 5-10 meters GNSS: Support Gobal Position System, Galileo, Glonass, Beidou Scanning Engine: Honeywell N4313 1D Symbologies: Code128,EAN-13,EAN-8,Code39,UPC-A,UPC-E,Codabar,Interleaved 2 of 5,China post 25,ISBN/ISSN,Code93 ,UCC/EAN-128,GS1 Databar,HIBC,etc. Rear camera: 800W pixel HD camera,Support auto focus, Flash, Anti-shake, Macro shooting Front camera: 200W pixel color camera Battery: 5000mah Rechargeable polymer battery 3.8V Standby time: >350 hours Working time: > 12 hours Charging time: ＜3H Expansion Card slot: Nano SIM card x 2, TF card x 1 Display: 4.0", 480×800 resolution TP: Support multi-touch Audio: Speaker (mono), Microphone,Receiver Keypad: 38 soft and hard rubber buttons, left button x1, right button x1 Sensors: Gravity sensor, light sensor, distance sensor, vibration motor      Language: Simplified Chinese, Traditional Chinese, English, Korean, Japanese,Malaysian,etc. Input Method: English, Pinyin, Five strokes, Handwriting input, Support soft keypad Operating temperature: -20℃ - 55℃ Storage temperature: -40℃ - 70℃ Environment humidity: 5%RH--95%RH(no condensation) Drop specification: 6 sides supports 1.5 meters drops on the marble within the operating temperature  Rolling test: 0.5m rolling for 6 sides, can still work steadily Sealing: IP66 Package Size: 26.7 x 11.7 x 7.5cm/10.5 x 4.6 x 3in Package Weight: 592g/20.9oz Packing List: 1 x PDA Machine 1 x Data Cable 1 x Protective Film 1 x Adapter 1 x Instruction Manual