The OHAUS TAJ Series was designed for precision portable weighing for a wide range of jewelry applications. From the Carat Series with high precision and a quick-open draftshield to the Gold Series for higher capacity weighing of precious metals and stones, the TAJ is a great value for your basic weighing needs. Ensure fair trade-comply with FTC guidelines Accurate weighing and counting promote good business practices. Add USB or RS-232 connectivity (order separately) to document and print data. Security features include rear security loop, integral transportation lock, and calibration lock-out. AC power or battery (four AA, not included) operation increase versatility