1. Hand free car kit
2. Recording and play function for important calls
3. Mute function for confidential conversation
4. Auto-answering for incoming calls
5. GSM/CDMA/TDMA/PDC compatible
6. System composition: Control box ECUHXNO + four O group sensors and cables + display HD270 and cable + one power cable
7. Non-standard combination
8. Grade N specifications
9. The closer the obstacle, the faster the alert beeping frequency
10. LED's (blue, green, yellow and red) to indicate different distances as well as orientation of the obstacle
11. Exact distance display