User interface:
 
1. Four buttons: On, Print, Select, Enter
 
2, 4-line LCD with 20 characters per line
 
3, 5 prompt lights-display bar code level
 
4. Voice recognition test results (merits and demerits, failures, low battery power)
 
Optional attachments:
 
1. Printer: TP140A
 
2. Battery charger (it can be used as AC power supply without battery)
 
3. Nickel-cadmium battery