?Perfect Gift?Purchase UNIWA 2 Pack electronic whistle at one time to meet the massive needs of referees, coaches, teachers, and officials. A set of matching 2 colors - black, and red is easy to distinguish users. The customized exquisite gift box packaging can be used as a gift for Father's Day, anniversaries, Christmas, and birthdays. It is the first choice for fathers, boyfriends, and colleagues. ?No Blow Electronic Whistle & Multi-Function? Compared with a traditional whistle, the electronic whistle can avoid mouth contact, and keep you safe, you just need to press the sound button then it will make a loud sound for you. One-button switch can create 120±5dB volume, it will be more sanitary and convenient among all sporting events, company activities, school games or other training, etc. ?Easy to Use & Carry with You? The hand whistle has the perfect size:5.4''×1.5'', suitable for pockets and backpacks. We have also prepared a drawstring pouch for you, which can better protect your whistle. It is also equipped with a 46'' lanyard, which can easily loop through a backpack or hang on your wrist and neck. The electric whistle can provide a loud, clear, strong, and easily recognizable sound. and easy to use in case of emergency. ?Durable and High-Quality ? Electronic emergency whistles are made of superior-high-quality ABS, it is a streamlined appearance, are compact in size, are crack-resistant, and fall-resistant.In addition, it comes with 4 Cr2032 Lithium batteries to ensure that you can use it for a longer time outdoors. If the sound becomes abnormal, please replace the battery. ?3 Tones Electronic Whistles?Electronic whistle can avoid mouth contact. Three distinct tones personalized whistles for your selection, you can choose the best sound for your demand, handheld electric whistles with Lanyard are a great gift for teachers referees coaches, suit for all sporting events, pet training, outdoor camping hiking emergency situations.