... 6A 4) Frequency: 510-410 Hz, +/-20 Hz 5) Durability: 50,000-100,000 times 6) Chassis ... compact and lighter whilst maintaining power and performance (5)Available in: High,Low (double). Twin or ... )Mounted as original or replaceable equipment by major car manufacturer,as BMW, BEN'Z, AUDI,V. ... , DAEWOO, KIA, HYUNDAI,etc. Hot sales Car horn double-frequency car speakers, snail horn, double-frequency electric ...