Attention! 
A.  Please check the real model of your original USB transceiver.
B.   You must know how to set it up. Otherwise don't buy it.
C.     Model: D100A-M . Computer hardware display: D100M

friendly tips：

1. Send 1-2 day. notice tracking id. Arrive about 10 days.

2. Condition：clean / work  

3. Check if your shipping address is wrong.

4. Check if the photos and ad are compatible with your items.

A. Did not receive the item. Please contact us in time.