OWON Digital Multimeter with Temperature Meter, Bluetooth Interface Owon B35T (with TrueRMS) Digital Multimeter 3 (5/6) full scale reading (features TrueRMS value) function as 3 in 1 : datalogger + multimeter + temperature meter multi-connection (more than one device) supported via mobile app the change trend analysis accessible via special chart mode large display with backlight, suitable for dark environment