Central door lockin system ,built in keyless entry system . remote window rollling up 1. Central door lockin system ,built in keyless entry system .2. Remote trunk release 3. Remote window rolling up4. Dual slide rail construction ,parting line sealed by ultrasonic welding 5. Motor is made by sino-japan joint verture 6. The master gear is metal 7. The gear is made of ABS plastic ,with rubber ...