Product Details: Product Name: Answer back function (lock and unlock with hazard lamp) Product Description: Simple and easy-to-use remote control. ■ With the Answer back function, you can check the light and sound when connected with a silence speaker (which is sold separately), so you can check the lock and unlock. ■ The included LED scanner also has a security effect (just a dummy) ■ You can also connect sound and light with the speaker siren sold separately. ■ Safety is confirmed for electricity flow and operation in Japan. It also comes with a remote control battery for confirming operation, so it can be installed and worked immediately. (It is a button battery, so it can be replaced even if the battery runs out! Uses 2 CR2016 button batteries per remote control). Installation support is supported, so you can install it safely. Supports keyless wiring and vehicle wiring (Please feel free to contact us by email or phone for installation information) Set Contents: 2 keyless remote controllers, 1 receiver (control unit) 1 wire cord (with fuse) 1 dummy security LED scanner. 1 double-sided tape x 1 each, English instruction manual compatible. Please check product compatibility and inquiry additional parts by email or phone. We will make each car model. Check your year and model status and let us know if there are any parts you need, such as the actuator.)