| ，Dimensions |
|
| ，Features |
| .Small size |
.Beautiful style |
.High volume |
| ，Model designation |
 |
| ，Specifications |
| .Dielectric strength: AC 1500V for duration of one minute. |
| .Insulation resistance:Over 100Ω@ DC500V |
| .Service life:Over than 30 minutes(continue) |
| .Volume(D.B):TBN-220,TBY-220 Series:Over than 85 D.B. |
| TBY-302 Series:over than 75 D.B. |
| 4BL-220 Series:over than 95 D.B. |
