No Blow Electronic WhistleCompared with traditional whistles with Lanyard, electronic whistle for teachers referee coach is best choice in special period. It gets rid of blowing whistle with mouth and keep you safe, easy to produce loud clear consistent 120-150DB sounds every time 3 Volume & Tone Electronic WhistlesHigh volume electronic whistle come with 3 tone for your selection, adjust the volume & tone that best meets your needs, handheld electric whistles with Lanyard is great gift for teachers referees coaches, suit for all sporting events, pet training, outdoor camping hiking emergency situations Superior Durable Electric WhistleElectronic emergency whistles is made of high quality ABS, it is streamlined appearance, compact size, crack-resistant and fall-resistant. electronic coach whistle come with 4PCS CR2032 batteries, if the sound becomes abnormal, please replace the battery first Easy to Use & Carry Electronic WhistleVery easy to use electronic referee whistle, select the demand volume & tone, press the button to make loud consistent sounds. Electric whistle emergency have compact size 5.35in1.57in, come with a 46'' in long lanyard for hang on wrist and neck or tie on backpack, and a drawstring pouch for store and protect the whistles Hygienic Multi-Function Electric WhistleElectric whistle don't need to blow with the mouth, so it can be used by multiple people and reused many times, it's more sanitary and convenient than traditional whistles with Lanyard. Electronic whistle could be used as sports whistle to referee and coach basketball, football, soccer and hockey competition, or pet whistle to training pigeon cat dog whistle, or outdoor camping hiking emergency whistle