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The Liftmaster 61LM-Compatible Stinger 390LMD21V Visor Style Remote is a specialized remote control designed for Chamberlain Liftmaster models from 1984 to 1992. Featuring a 390 MHz frequency and 9 trinary dip switches for secure coding, this lightweight remote offers a maximum range of 10 meters and operates on a single 12V lithium battery.
| Brand | Transmitter Solutions |
| Model | 390LMD21V |
| Product Dimensions | 5.08 x 2.54 x 2.54 cm; 4 g |
| Batteries | 1 12V batteries required. |
| Item model number | 390LMD21V |
| Hardware Platform | infrared |
| Display Technology | lcd |
| Power Source | Battery Powered |
| Battery Description | Lithium |
| Batteries Included | No |
| Batteries Required | No |
| Connector Type | Radio Frequency |
| Includes Rechargeable Battery | No |
| Country of Origin | USA |
| Item Weight | 4 g |
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