Klakson Denso Keong Waterproof Power Tone 3390 - 12 Volt Set Original - Made In Indonesia 1. DENSO "Power-Tone & Harmonic Sound Horns" Are suitable for all types of vehicles . Refer to the examples of installation and wiring before installing each horn. 2. Prior to installing the horn, Disconnect the battery cable. 3. Take a proper position of installation where the horn can be free from direct splash of water, Strong vibration or resonance with the body. 4. Install the horns as the vent direct downward as shown in fig . 1,2,3 5. By loosening The nut, the angle of installation for holder can be changed freely as shown in Fig. 4 for nut tightening torque: 11,8 ~ 13,7 N.m