SDR Transceiver Radio Receiver Open Source USDX QRP HF 8 Band USDR Shortwave Radio Receiver Transmitter for DIY 100‑240V EU Plug Item Type: SDR Transceiver Radio Receiver Material: Aluminum Alloy Filter: 4000, 2500, 1700, 500, 200, 100, 50hz passband DSP function: automatic gain control (agc), noise reduction (nr), voice trigger, voice trigger xmit, attenuator rx(att), tx noise gate, tx drive control, volume control, and dbm/s -meter Ssb reverse sideband or carrier suppression transmission:better than -45dbc, imd3 (dual tone)-33dbc: reception: betterthan -50dbc Mds receiver noise level: -135dbm (200hz bw) at 28mhz Pre receiver selectivity: steep frequency adjustment -45db/ten times roll off /-2khz Blocking dynamic range: 20khz offset 123db, 2khz offset 78db Three switchable analog controllers independent of the front receiver: 0db, -13db, -20db, -33db, -53db, -60db, and -73db Lightweight, low cost transceiver: Thanks to the eer electronic liquid level transmitter, it has high powerefficiency (no need for a huge heat sink)and simple design (no need for complex balanced linear power amplifiers) Built in Lithium Polymer Battery: 6000mAh