Replacement Model: Replacement for Linear Megacode ACT-31B ACP00879 MCT-11 DNT00090 MCT-1. Attention: Not compatible with dip switch garage door openers. Compatible with: LINEAR LD033, LD050, LS050, LC075, LDCO800, LSO50, and LSO50-2T Garage Door Openers. Works with Linear MegaCode Receivers: MDR, MDR-U, MDR-2, MDRG, MDRM, -2, and SMDRG. Extended Battery Life: Features a reliable 240mAh lithium battery for long-lasting power and consistent performance. Ultimate Durability: Built to last, this remote has been tested for over 100,000 cycles, ensuring long-term reliability. Megacode Rolling Code: Provides enhanced security with rolling code technology, offering safe operation up to 164 feet. Color: Black Material: Plastic Package Contents: 2 x Remote Controls Note: Other items not included. Due to lighting effects and monitor settings, the actual color may vary slightly from the image. Measurement error allowed within +/- 1-3 cm.