2PCS 18 Tone Echo Horns 105dB Car Auto Truck Vehicle Horn Surround Dual Snail Horn Waterproof Dustproof Warning Alarm

Features - Optimized Warning Effect - Pulsating air colum created melodic two-tone (dual tone) sound with fan like sound propagation. - Long life & reliability - Easy installation and reliable - Convenient for security driving - 18 tones surround

Specifications 1. Power supply: 12V 2. Siren: Low 410Hz; High 510Hz 3. Loudness: 105db 4. Weight: 486g

Installation guide 1. The installation of this horn is samc as the normal horm 2. The electronic control system is installed near the horn 3. The black line is connected with the conductor parts of the body

Connection Guide 1. Red line connect with battery+ 2. Black line connect with the battery- 3. Blue line connect with the button of the hom 4. Green line connect with the high frequency(510HZ)horn 5. Yellow line connect with the low frequency(410HZ)horn If there is no frequency indicaion, please repeat the above 4 and 5 steps to find the best sound

Operation Guide 1. The electronic system control the horn to transform the sound 2. Press the button continually for 3 times, the transformation of the sound is finished 3. Repeat the above step to transform the sound continually 4. One sound will be kept until you press the button

Package Included: 1 Pair Echos Horns 2 x Brackets and Screws 1 x Controller Relay