Upgrades for -One R9: MAX2837 is replaced by MAX2839. Si5351C is replaced by Si5351A with additional clock distribution. A series diode is added to the antenna port power supply. For One is a peripheral capable of transmission or reception of radio signals from 1 MHz to 6 GHz. Designed to enable test and development of modern and next generation radio technologies, for One is an open source hardware platform that can be used as a USB peripheral or programmed for stand-alone operation. 1 MHz to 6 GHz operating frequency. Half-duplex transceiver Up to 20 million samples per second. 8-bit quadrature samples (8-bit I and 8-bit Q) Specifications: For Radio, SDR#, and the like Software-configurable RX and TX gain and baseband filter Software-controlled antenna port power (50 mA at 3.3 V) SMA female antenna connector SMA female clock input and output for synchronization Convenient buttons for programming Internal pin headers for expansion Hi-Speed USB 2.0 USB-powered Open source hardware for MHz to 6 GHz SDR platform development board About for PortaPack H2: Description: This usually comes with a new crystal clear case so you can see all the beautiful silkscreen art. Comes with a built in microphone. Has new CPLD code so the reboot button doesn't freeze the device unlike some of the other H2's on the market. This Version of PortaPack H2 adds a 10.00MHZ TCXO FOX 5070 crystal oscillator to the for-original 2nd generation H2 Support the latest official firmware upgrade Specification: 3.2-inch TFT240*320 screen Navigation switch Audio output Microphone input DC 2.1 interface 4-layer gold plate Type:A:Without 35DBi GSM/3G/4G Antenna Colour:Black Material:PCB+electronic components+Metal Package Contents: 1 x Assembled for Portapack H2 + for One 1MHz to 6GHz SDR 1 x Telescopic Antenna 1 x Micro-Usb Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.