Janeube Electronic Whistle for Coaches 3 Tones Handheld Whistle with Lanyard/Pocket, High Volume for Referee Coaches, P.E. Teacher Marine Police Outdoor Camping, Self Defense Emergency (Yellow)
- ...t can be reused only by replacing the battery(4 CR2032 batteries). Compared with the traditional coach whistle, it is less prone to wear and has a longer service life..
- Widely Application Electronic Whistle - Sports events, coach, extracurricular activities, group outings, training pets, field adventures, and distress signal. Don't use it in a small space, and do not aim it at ears, so as not to cause damage to others' hearing..