Owon 2100B:
Quick tests:
DC current:
DC:
AC:
With 100HZ freq.:
And no AC measurements with this freq. but freq. can be still measured:
Resistance:
100K:
10K:
1K:
100:
Cap.:
1n:
10n:
100n:
1u:
Not so precise, but it’s not for precise measurements 
Bluetooth just works like in my «old» Owon multimeter:
