1. Code is difficult to repeat 2. Change action mode just by transmitter 3. Build-in inside motor or outside motor 4. Built-in action indicator beeper 5. Change action mode (Step by step / Continuation / upside down) 6. BT-INR88: 9.7*2.9*2.9cm(built - in tubular motor) 7. Easy to add code 8. Transmitter has multi types can choose ex: 1:1 or 1:15 channel 9. LCD display and saving power mode Specification: - Voltage: AC110V/60Hz & AC220V/50Hz - Frequency:433.92MHz - Receiver: BT-R88IN-R88IN-288