My friend, if you need to buy the 20 pcs/pack link, or the link that doesn't include the shipping cost, then you can click on the picture below to jump to the corresponding link to buy, the price may be cheaper. Remote control HORMANN ECOSTAR RSC2, RSE2 compatible remote control 433,92Mhz transmitter rolling code 433 MHZ garage door opener 100% Compatible Model: HORMANN ECOSTAR RSC2 HORMANN ECOSTAR RSE2 Hormann Prolift Pls kindly note,we only sell the replacement remote,not the original one Description: 1. Type of programming: Programming with the receiver 2. Number of channels: 4 3. Code: rolling code 4. Frequency: 433.92MHz 5. Battery: 12V 27A With battery Uses: garage doors, motorcycles, car alarm products, home security products, short-range wireless remote control products, industrial control products Feature: 1. Free Battery 2. Free Coding Instructions 3. Free Keychain 4. Heavy Duty Design 5. In-built Battery 6. Button Protector How to use our remote control 1. Press the LEARN button or the transparent button located under the ECOSTAR motor. The LED light on the motor blinks slowly. Let the button go. 2. During the next 10 seconds, press a desired button on your new remote control. 3. The LED light on the motor blinks faster. Let the button go. 4. Press the same button again on your new remote control. Keep it pressed down. 5. The LED light on the motor blinks very fast. Let the button go. 6. Your new remote control is programmed. ATTENTION : You can program only 6 RSE2 remote controls with the ECOSTAR motor To erase all your remote controls: 1. Press the transparent button P located under the ECOSTAR motor. Keep it pressed down. 2. Wait 5 seconds. Let the button go. 3. The LED light on the receiver blinks slowly for 1 second, then faster for 4 seconds and then very fast for 2 seconds. 4. All the remote controls are erased. Compatible with the following EcoStar garage door operator models: Ecostar Liftronic 500, 700, 800 and Portronic D5000, S4000, D2500