Features: 1) Ultrasonic welded and excellent waterproof 2) Available for any car alarm system 3) Either single control or double control is available 4) For 2 door or 4 door lower case and upper case 5) Inside 360? full angle available 6) No resistance like a clutch available Contact : MIchael Lee Tel:86-21-64145761-8012 Fax: 86-21-64145447