1. Display
2. Power Adapter Socket
3. Frequency Button
4. ▲ Button
5. CAL Button
6. Backlight Button
7. ◄, D/Q/θ Button
8. REL/%/ ▼ Button
9. Input terminals (pin terminals)
10. Input terminals (banana terminals)
11. Hold Button
12. RS232 Port (not active on this model)
13. L/C/R Button
14. Enter Button
15. ►, SER/PAR Button
16. Sort Button
17. Setup Button
18. Power Button
19. Stand (rear)
20. Battery Compartment (rear)