Single power on/off switch: The battery no longer phantom drain when power is off, which means device can be completely powered off. Advanced battery management IC Matte screen: This matte screen can help you see content on screen more clearly in sunny outdoor environments. GPIO Port: The H2M adds a GPIO port, allowing users to create their own add-ons for H2M, similar to . This is a major and a feature in previous versions of Portapack. Improved charging speed: The H2M has improved charging quality and speed. For One Specifications: Operating from 1MHz to 6GHz Half-duplex transceiver Up to 20 million samples per second 8-bit quadrature sampling (8-bit I and 8-bit Q) Works well with Radio, SDR#, and more Software configurable RX and TX gain and baseband filters Software controlled antenna port power (50 mA at 3.3 V) SMA female antenna connector SMA female clock input and output synchronization Convenient programming button Internal pin header expansion Open source hardware For MHz to 6 GHz SDR Platform Development Board H2M Improvements: Microphone on/off switch: It allows you to turn microphone on or off. Automatic sound switching between headphones and speakers: When headphones are plugged in, the H2M automatically switch from speaker mode to headphone mode. This is a feature in previous versions of Portapack. Color:As Shown Material:Plastic+Metal Package Contents: 1 x SDR Radio (PortaPack H2M + FOR One) 1 x 2.4/5/5.8GHz Antenna 1 x 35DBi GSM/3G/4G Antenna 1 x 40MHz-6GHz Telescopic Antenna 1 x 40MHz-860GHz Antenna 1 x 700MHz-2700MHz Antenna 1 x USB Cable 1 x Power Amp Board 1 x SMA Cable Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.