The PMR-171 leverages an externally attached modular 5AH battery-carrier designed to bean ideal complement for fully self-contained field radio deployments. This is especially true when the modular battery carrier is augmented with dual battery backup and the radio’s native ultra-low power consumption architecture to significantly extend battery-powered operation times. To serve the varied interest of modern amateur radio operators, the Hamgeek PMR-171 also offers a standardized external 9VDC-18VDC power input (with reverse connection protection), allowing it to be equally at home in fixed-station and vehicle/mobile deployment scenarios. To provide an optimized operational experience in a multitude of environments, the visual interface of the PMR-171 is designed around a high-resolution LCD display, with adjustable backlight brightness. This, combined with the user-selectable brightness level of the keypad, allows for clear and easy readability, even under the glare of mid-day outdoor conditions. Designed as a modern multi-function SDR platform, the Hamgeek PMR-171 supports the QRadioBLE mobile app (amongst others), allowing for wireless control of the radio via Bluetooth and transforming operation and control into a convenient and fast app-based experience that very effectively eliminates problems related to wired common-mode interference. When direct wired connections are desired, the integrated internal sound card and serial control interface can still be accessed via a single USB cable, allowing for the support of a wide range of standard amateur radio software on a wide array of host computing platforms. The Hamgeek PMR-171, along with its assortment of optional add-on modules (Compass, DMR & GPS) are meant to bring joy to your QRP and Field-Radio operation. Ultra-wide working input voltage range: 9VDC to 18VDC (some TX levels limited by input voltage) – Power supply with reverse connection protection – Built-in GPS/BeiDou, electronic compass and accelerometer (acceleration and angle sensor) (optional GPS module required) – GPS timing (optional GPS module required) – RTC clock set capability – Voltage monitoring/display – Ultra-lightweight: =2kg/4.4lb – Bluetooth wireless control (viable for Bluetooth FT8) Application: – Emergency Communications – Remote Spectrum Monitoring/Detection – Radio Direction Finding – Amateur Radio Package Included: – 1 x HAMGEEK PMR-171 SW radio – 1 x Lithium battery – 1 x Handheld microphone – 1 x Single-head power supply – 1 x Dual-head power supply – 1 x USB disk – 1 x USB cable Note: – Other items pictured are not included, for demonstration purposes only. Thank you for your understanding! – If you need one more battery, please contact customer service and pay 125USD for the battery. Optional accessories (contact customer service for quotation): – VHF UHF antenna, tactical headphones, tactical handle, tactical helmet, tactical PTT, tactical bone conduction headset, backpack and battery. Usually it costs about 30USD-50USD. Thanks for your understanding. If you receive the item that not satisfied or defective, please do not open case and kindly notify us within 30 days.