Specification:
Item Type: Whistle
Material: ABS Resin
Size: Approx. 49 x 20 x 13mm / 1.9 x 0.8 x 0.5in
Frequency: 0-4000 Hz
Features:
1Independent sound holes on both sides. In volleyball matches, the referee is located in the middle of the court, and the sound can be spread to both sides. 2Considering that human ears are more sensitive to 10004000Hz audio, so the treble frequency is set to 4000Hz. 3Adjustable nylon lanyard, the lanyard can easily pass through the tail hole, and the length of the lanyard is fixed by double balls, so you are not afraid of losing or falling. 4Made of ABS resin, whistle is environmentally friendly material, hot and cold temperature resistant, light weight, very portable. 5Widely use, the whistle bulk are great for referees, coaches, teachers, training, survival, emergency, school, sports, give away etc.
Package List:
1 x Whistle
1 x Lanyard
1 x Mouthguard
1 x Storage Box
