1, depending on the standard, this is very important. Authentic standard printing is absolutely clear, and even if it is worn, there will never be double printing and uneven ink.

2, look at the shelf, the BOSE logo on the shelf, genuine clear, smooth, round, will not appear very mechanical, blunt.

3, look at the basin, genuine workmanship is very good, excuse basin glue is very uniform, very bright, there will be no uneven gluing phenomenon.