Instruction for choosing resistance:

M1: The total resistance value is 5K, but the effect adjustable resistance range is from 1.8K to 2.5K, then from 2.5k to 3.2K.

M2: The total resistance value is 5K, but the adjustable range is from 0K to 2.5K, then from 2.5K to 5K.

M3: The total resistance value is 10K, But the adjustable range is from 3.5K to 5k, then from 5K to 6.5K.

M4: The total resistance value is 10K, But the adjustable range is from 0K to 5K, then from 5K to 10K.