FAN HORN HAND HELD , SOUND BY HAND , 115 DB SOUND , WITHOUT GAS , VERY GOOD TO EARTH , ... ) we think it will interst you .It sounds just by hand no gas in pump , it is very LOUD MOUTH ... and also ECOFRIENDLY ,INSTRUCTION OF HAND PUMP AIR HORN1. install horn by screwing it on air pump2. spring ... back handlebar by unscrewing3. handle air pump and push down handlebarWe ...