Features 1High Configuration Android 9.0 operating system, quad-core processor, stable and reliable, simple operation, strong compatibility. 2G+16G large memory, running multiple tasks at the same time, still smooth and not stuck. Support NFC function. 2Built-in Barcode Scanner High performance 1D/2D scanning engine, which can quickly scan and identify 1D/2D/QR barcode, high reflective barcode, frayed barcode, fuzzy barcode and screen barcode, ideal for inventory, warehouse, logistics, retail, etc. 3Multiple Network Modes Support 4G, 3G, 2G, BT and WiFi network modes, and make business data interconnection more stable and efficient, free from geographical restrictions, enjoy high-quality network communication and rapid data transmission anytime and anywhere. 4Long Endurance /u0026 Durable Built-in 3750mAh Li-ion polymer battery, high performance and low consumption processor, long life, ensuring the smooth progress of the work. Made of high quality ABS and PC materials, enabling the terminal durable and has long service life. 5Ergonomic DesignEquipped with 4 inch color screen and full digital keyboard, realize the good experience of large screen and one hand operation. Newly designed ergonomic scanning angle can effectively reduce wrist movement and fatigue. 5 million rear camera with auto focus function, quickly identify the code 6Modular DesignUsers can customize and expand according to their needs to meet the needs of various industries. Supports secondary development of software and hardware to meet user needs in an all-round way. Specification Features: High Configuration Android 9.0 operating system, quad-core processor, stable and reliable, simple operation, strong compatibility. 2G+16G large memory, running multiple tasks at the same time, still smooth and not stuck. Support NFC function. Built-in Barcode Scanner High performance 1D/2D scanning engine, which can quickly scan and identify 1D/2D/QR barcode, high reflective barcode, frayed barcode, fuzzy barcode and screen barcode, ideal for inventory, warehouse, logistics, retail, etc. Multiple Network Modes Support 4G, 3G, 2G, BT and WiFi network modes, and make business data interconnection more stable and efficient, free from geographical restrictions, enjoy high-quality network communication and rapid data transmission anytime and anywhere. Long Endurance & Built-in 3750mAh Li-ion polymer battery, high performance and low consumption processor, long life, ensuring the smooth progress of the work. Made of high quality ABS and PC materials, enabling the terminal and has long service life. Ergonomic DesignEquipped with 4 inch color screen and full digital keyboard, realize the good experience of large screen and one hand operation. Newly designed ergonomic scanning angle can effectively reduce wrist movement and fatigue. 5 million rear camera with auto focus function, quickly identify the code Modular DesignUsers can customize and expand according to their needs to meet the needs of various industries. Supports secondary development of software and hardware to meet user needs in an all-round way. Specification: Model: 3503M Dimension : : 170x70x40mm(LxWxH) Weight: 270g Display: 4.0 inch IPS, 800*480 OS: Android 9.0 SDK: ZKC SDK Development Language: JAVA Touchscreen: Capacitive touchscreen Battery Built-in non-removable Li-ion polymer battery,3.7V, 3750mAh Battery Charging time: about 150 minutes Battery Standby time: about 14 hours of continuous video playback Port: Serial port, GPIO, I2C, USB Type-C, etc Card slot: 1*SIM card, 1*TF card, Max 128GB Adapter: DC 5V, 3A or quick charge adapter Temperature and humidity: Temperature: -1050, humidity: 095% Audio: Receiver, speaker, mic, vibrator Video: decode 1080p@30fps H.264/H.265; encode 1080p@30fps H.264 CPU: MTK MT6739, ARM Cortex-A53 CPU cores: Quad-core CPU frequency: 1.3 Ghz Memory: 2GB RAM, 16GB ROM Network: 4G (LTE-FDD B1/3/5/8,LTE-TDD B38/39/40/41 ), 3G(WCDMA B1/2/5/8, TD-SCDMA B34/39),2G(GSM B2/3/5/8 ) Barcode Scanner Module: 2D image module 1D: UPC/EAN, UPC/EAN with supplementals, Code128, GS1-128, Code 39, Trioptic Code39, Code 32, Code 93 Code11, Matrix 2 of 5, Interleaved 2 of 5, IATA 2 of 5, Industrial 2 of 5, Codabar, CodablockF, MSI, Telepen, Code11, GS1 DataBar variants 2D: PDF417, MicroPDF417, Composite Code, Data Matrix, Maxicode, QR Code, MicroQR, Aztec Rear Camera: 5.0MP auto focus camera Flashlight: Rear single LED flashlight Package Size: 215x108x75mm/8.4x4.2x2.9in Package Weight: 500g/17.6oz Packing List: 1 x Device 1 x USB Type-C Data Cable 1 x Adapter Package List 1 x Device 1 x USB Type-C Data Cable 1 x Adapter