| ITEM | Part Name | Description | Datasheet | Remark |
| 1 | M581B | 3 Keys Single Tone Door Bell-1 Time/2 Time |
 |
Replace M581A |
| 2 | M582A | Single Tone Door Bell IC-2 Time |
|
|
| 3 | M60/M602 | Dual Tone Door Bell 1 Time/2 Time |
|
|
| 4 | M995C-DBx/C1x | 3 Key Dual Tone Door Bell IC |
|
-DB,-DB2,-C15 |
| 5 | M995-DB2 | 3 Key Dual Tone Door Bell IC |
|
| ITEM | Part Name | Description | Datasheet | Remark |
| 1 | M1E/M1D-95 | 2 State Dual Tone Remote Door Bell IC,Pair With M1E |
|
|
| 2 | M3E/M3D-95 | 3 State Dual Tone Remote Door Bell IC,Pair With M3E |
|
