Item: SW525A(red light)/SW525B(red light)/SW525G(green light)/SW526A(red light)
1. Screen size: 9.6 inch (SW526A 18 inch)
2. Measurement range: 30-130dB
3. Accuracy: +/-105dB
4. Frequency response: 31.5Hz~8.5Hz
5. Microphone: 6 mm condenser microphone
6. Digital display: 3 digits
7. Power supply mode: DC 5V 1A Micro USB interface
8. Working temperature and humidity: 0 ~ 40 degrees, 10% ~ 80% RH
9. Storage temperature and humidity: -10 to 60 degrees, 10% to 70% RH
10. Size: 21 × 13 × 2.8 cm(SW526A: 40×23×3.5cm)
11. Net weight: 453 grams(SW526A:1531g)

Item: SW535A
1. Screen size: 18 inch
2. Measurement range: 30-130dB
3. Accuracy: +/-1.5dB
4. Frequency response: 31.5Hz~8.5Hz
5. Microphone: 6 mm condenser microphone
6. Digital display: 3 digits
7. Power supply mode: DC 5V 2A power supply
8. Working temperature and humidity: -20 ~ 60 degrees, 0% ~ 100% RH
9. Storage temperature and humidity: -10 ~ 60 degrees, 20% ~ 70% RH
10: Alarm prompt: sound + display alarm
11. Alarm output: output 5V voltage
12. Size: 40 x 23 x 3.5 cm
13. Net weight: 1531 grams