Solid and loud out of the box. The two tubes are solidly spot welded together and the case has T7 screws so it can be disassembled for cleaning. Benefits from 2 minor adjustments: 1) There's a little foam plug near the mouth end. Not sure what it's there for but it could get dirty and gross with use. Fortunately it comes out easily. 2) A good whistle makes a mix of frequencies to be easily heard. This is why many have multiple different resonance cavities. If one of the two plugs opposite the mouth end is pushed farther in about 1mm, you get a much more "hearable" mix of tones. I get about 2400Hz on one and 2500Hz on the other after adjustment.

Solid and loud out of the box. The two tubes are solidly spot welded together and the case has T7 screws so it can be disassembled for cleaning. Benefits from 2 minor adjustments: 1) There's a little foam plug near the mouth end. Not sure what it's there for but it could get dirty and gross with use. Fortunately it comes out easily. 2) A good whistle makes a mix of frequencies to be easily heard. This is why many have multiple different resonance cavities. If one of the two plugs opposite the mouth end is pushed farther in about 1mm, you get a much more "hearable" mix of tones. I get about 2400Hz on one and 2500Hz on the other after adjustment.

Solid and loud out of the box. The two tubes are solidly spot welded together and the case has T7 screws so it can be disassembled for cleaning. Benefits from 2 minor adjustments: 1) There's a little foam plug near the mouth end. Not sure what it's there for but it could get dirty and gross with use. Fortunately it comes out easily. 2) A good whistle makes a mix of frequencies to be easily heard. This is why many have multiple different resonance cavities. If one of the two plugs opposite the mouth end is pushed farther in about 1mm, you get a much more "hearable" mix of tones. I get about 2400Hz on one and 2500Hz on the other after adjustment.

Excelente Servicio y excelente calidad muchas gracias envío muy rápido y en perfecto estado gracias

Excelente Servicio y excelente calidad muchas gracias envío muy rápido y en perfecto estado gracias

Excelente Servicio y excelente calidad muchas gracias envío muy rápido y en perfecto estado gracias

Product corresponds to the description. Very good quality. Very light and really very loud. Good buy.

Product corresponds to the description. Very good quality. Very light and really very loud. Good buy.

Product corresponds to the description. Very good quality. Very light and really very loud. Good buy.

These are good and loud. I like that I can hang mine from my keys or pants on a walk.

These are good and loud. I like that I can hang mine from my keys or pants on a walk.

These are good and loud. I like that I can hang mine from my keys or pants on a walk.

I am pleased with the look, quality and price ...

I am pleased with the look, quality and price ...

I am pleased with the look, quality and price ...

Good quality material. Received in 12 days. Nice packaging by sender. secured with foam to avoid getting dents on metal. Thanks.

Good quality material. Received in 12 days. Nice packaging by sender. secured with foam to avoid getting dents on metal. Thanks.

Good quality material. Received in 12 days. Nice packaging by sender. secured with foam to avoid getting dents on metal. Thanks.

Pleased to receive such an amazing product.

Pleased to receive such an amazing product.

Pleased to receive such an amazing product.

Very good wisthle, powerfull and good quality !

Very good wisthle, powerfull and good quality !

Very good wisthle, powerfull and good quality !

Very good quality. Very light and really very loud. Good buy.

Very good quality. Very light and really very loud. Good buy.

Very good quality. Very light and really very loud. Good buy.

extremely loud !!!!!!

extremely loud !!!!!!

extremely loud !!!!!!