Product Description:
- Measurement:
Large size: 1.22"Length X1.18"Width x0.29" thickness, inner diameter: 0.807''/20.5mm
Small size: 1.162"Length X1.122"Width x0.29'' thickness", inner diameter:0.748''/19mm
- Materials: ABS;
Single weight: 2g
In Unique ring design;

MULTI-USE: All-in-one portable ring whistle. Dual high & low frequency sound holes, compact ring shape for all-day wear. Double Tone Sports Referee Whistle, High Decibel Ball Game Whistle for Football, Basketball, Soccer, Outdoor, Hiking, Camping, Dog training & Emergency Survival & Rescue.

Selling points:
*Always have a whistle at your fingertips!.
* 2g Ultra-Light Wearable Ring Design, No Burden All-Day Carry .
* Two sizes (19 mm / 20.5 mm inner diameter) fit different finger circumferences and allows for easy one-finger operation.
* Built with dual independent air holes for low-pitch (85dB) and high-pitch (120dB) sound emission.

- Simply fit in your finger and blow gently to switch between high and low tones at two ends, no complicated operations. Ergonomic design ensures comfortable blowing.
- Multi-Purpose Whistle for Referees, Coaches, PE Teachers, Lifeguards, Outdoor Enthusiasts & Daily Emergency Use.
- It is an attractive convenient whistle that fits on your finger like a ring, freeing up your hands while ensuring that you always have a cwhistle at your fingertips!
- It`s a whistle! as well as a ring!- for stress-free training and a stronger bond between pet and owner.

Kind Reminder:
Blow the ring whistle horizontally for best effect.
Air inlet and outlet are close. Do not cover the air outlet with your mouth.
Contains small parts. Not suitable for children under 3 years. Please keep away from young children to prevent choking.