Duplex variant of MMDVM_HS_Hat This PCB uses the MMDVM_HS . It has two ADF7021 onboard and allows for duplex operation with two time slots on DMR.Revision 1.0An accidentially deleted 3v3 wire has been added back to the PCB layout. BOM, Mouser cart and stencil stay the same as for rev1.1.High performance 32-bit ARM processorFully testedSupports DMR, P-25,D-Star and System FusionOnboard LEDs to show status (Tx,Rx,PTT,Mode)Up to 10mW RF powerSMA antenna connector,Antenna includedMounts cleanly on all current Raspberry Pi's including the Pi ZeroThe firmware is pre-loaded and is easily upgraded via software.Open source 3D printable case availableUHF 430-450 MHz,433mhz and 900MHzVHF 144 220 Opera FREQThe upper part is TX,the lower is RX antenna.UHF+VHFSMA,antennaModem select:STM32_HS_GPIOSet TX frequency,RX frequencyTX,RX frequency had better 10M or more apart.SLOT1,SLOT2 support.colour:greenMaterial:PCB+plasticsize:70*60*20mmPackage Contents:1 *MMDVM HotSPOT Module + OLED2 *antennaNote: Without shellNot include the raspberry piThe firmware is pre-loaded. if you want update pls Click Updated siteOnly the above package content, other products are not included.Note: Light shooting 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.