Slightly larger the diminutive MTR-3B but with many features offered for a tiny penalty in weight.
Broadband RX - 5 to 16 Mhz. Covers several SW broadcast bands, in addition to full band coverage on 40M/30M/20 meters. 5 watts, CW/CWR/ (rx only in the LSB/USB mode) Despite being CW tx only, this fill many needs and provides NVIS capability on 40 M (7 Mhz)
Waiting for mine to arrive as it will replace my MFJ-9200. While it is just 3 bands, these bands are the most popular for QRP work in the field.
Input can be 8 to 15 VDc,an important distinction from the MTR-3b.
At $188 USD, much less expensive the the LNR Precision MTR-#b ($300 USD)
These are very compact radio sets.
More data and photos at the vendor website