
| Model | 528A | 538A | 
| Frequency analysis bandwidth | 100Hz~2000Hz | 100Hz~3000Hz | 
| Frequency division (Center frequency) | a、100 Hz b:200 Hz c:400 Hz d:800 Hz e:1K Hz f:1.5K Hz g:2K Hz | a、100 Hz b:200 Hz c:400 Hz d:800 Hz e:1K Hz f:1.5K Hz g:3K Hz | 
| Screen | 7 inch color LCD screen | |
| Battery life | Working time after fully charged ≧35hours | |
| Operation temperature | -10℃~+50℃ | |
| Size of instrument | (L×W×D):270×169×68mm | |
| Weight | Main box (include battery):0.77 kg Cable-controlled components:0.24 kg Vibration pickup:0.35 kg Headset:0.35 kg Probe components:0.38 kg Aluminum case(include Main box and accessories):5.55 kg | |