Garage door operen JG-CK688 Specifications: 1. Have obtained CE certificate. 2. Adopts electronic limit. Always keep the limit when the power fail. 3. With the advancedrolling code remote control technology, long remote distance. 4. Hiding design, high speed (0.2m/sec), low noise. 5. While meeting obstruction, the door stops moving upward or rebounds while it is closing down. 6. With more light AC indicator on when the motor is working. 7. Auto close down setting timer function is optional to close down door after open up 8. Connecting siren and infrared detector are optional. 9. Packing:Carton dimensions: 0.51 x 0.3 x 0.22m Model JG-CK688Elevating power600N(6 N·m)Electric motorDC 24VSoft start /stop√TransmissionChainTrackIron 4-segment C model trackFrequency433.92mHzReceiver model Superheterodyne Storage register12Remote control coding Hopping codeRemote controlSingle / Multi channelAutomaticalclose√Max door size9.4m2Max elevating weight94kgElevating speed10 15cm/sInput electric sourceAC220V±10% 50HzControl distance100mRemote control battery 12V/27AOperating temperature-20 +50 degree centigrade