Your BlueDriver Multimeter runs on a 9V battery and has two fuses: 

1. Fast Acting Ceramic or Glass 20A/250V
   6mm x 30mm
    
2. Fast Acting Ceramic or Glass 1A/250V
   6mm x 30mm
   
   A note on fuses: Any fuse ranging from 22mm-32mm will fit as well.

To access the battery and fuses: 

1. Place the multimeter face down
    
2. Pull up to extend the stand
    
3. Remove the two screws as shown
    
4. Replace the battery or appropriate fuse