Prog . Att.


HP-33321SG
0 ~ 35dB / 5dB
https://sites.google.com/a/e-channel.com.tw/www/products-chan-pin-mu-lu-e/-er-shou-she-pin-yuan-jian/prog-att/hp-33321sg

HP-33321H
HP-33321GHP-33321SC
0 ~ 70 / 10dB