Specification looks fine. Few pages of instruction is shared with DT9201A, DT9202A, DT9203A, DT9204A, DT9206A, DT9207A and DT9206A. These other models differ mostly in function set selection, i.e. they offer frequency or temperature measurement in place of one of the 200MOhm resistance range. DT9203A and DT9204A have 4.5 digit reading and better nominal accuracy.
Multimeter is based on ICL7106 chip (or its clone?). Two other ICs visible here are LM324. When looking at other dissasembly pictures on the internet it's clearly visible that actual PCB design varies greatly between particular multimeters marked as DT9205A. In particular many of them are built mostly with THT components placed on opposite side of the PCB. Schematic for those is easy to find and seems more or less matching this one - main difference is using 4 dual instead of 2 quad operational amplifiers.
Built quality and input protection is in pair with price.
- diode forward voltage measurement is highly inaccurate, i.e. it shows ~800mV forward voltage for red LED diode