portable waterproof electronic measuring and timing instruments used to monitor environmental conditions, namely, wind speed, temperature, relative humidity, heat stress index, dew point, biometric pressure, and altitude; megaphone; portable waterproof megaphone; miniature waterproof rechargeable amplifiers; audio waterproof speakers; speaker system, namely, microphone, speakers, cables, boxes and microphone and speaker stands; waterproof electronic sound amplification, measuring and timing i...