One Small Tool for Big Outdoor Moments
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Stay ready wherever the trail takes you.
This compact 3-in-1 whistle packs a loud signal, easy-to-read compass, and handy thermometer into one lightweight tool. It slips into any pack and keeps you prepared for hikes, camping trips, outdoor events, and training sessions.
Smart protection in your pocket.
✔ 150 dB whistle for quick signaling
✔ Built-in compass for simple navigation
✔ Thermometer for fast temperature checks
✔ Compact ABS design for everyday carry
Wipe clean with a dry or slightly damp cloth. Size: 6 × 3.3 × 2.8 cm.
We are proud to offer duty-free, reliable, tracked shipping— delivered to your door in over 200 countries worldwide!
Below you can check our average shipping times:
Domestic USA Shipping: 2-9 business days
US & Canada: 7-18 days
Europe: 7-18 days
Europe Plus*: 8-30 days
Australia, New Zealand: 7-18 days
Hong Kong, Singapore: 7-18 days
Rest of the world: 8-30 days
*does not include processing times up to 2 business days or longer in peak periods
Primarily we ship out from fulfillment centers in the United States, Eastern Asia and Western Europe. If the item you've purchased is out of inventory in your nearest location, we'll send it directly from our production lines at the same delivery times as stated in our shipping section.
How loud is the whistle?
It reaches up to 150 dB, making it easy to signal in open outdoor spaces.
Is the compass simple to read?
Yes, it uses a clear north/south needle for quick direction checks.
Is it lightweight to carry?
Yes. Its compact ABS build makes it easy to clip or keep in a pocket or pack.
The strong 150 dB whistle helps you stand out in open outdoor areas when you need attention.
The built-in compass offers a quick way to check direction on hikes or during exploration.
A handy thermometer helps you stay aware of changing conditions.
Simple size fits comfortably in a pocket, pouch, or on a lanyard.
ABS plastic keeps everything lightweight and dependable for outdoor use.
More function in one small survival essential.
| Features | MK Aquarium | Knock-Offs |
|---|---|---|
| 150 dB whistle | ||
| Built-in compass | ||
| Built-in thermometer | ||
| Compact carry size | ||
| Durable ABS body | ||
| Multi-use outdoor tool | ||
| Easy for beginners | ||
| Great for training pets |
Yes. It’s designed for outdoor use and fits easily into a pack.
No. It works right out of the box.
No. It uses a simple built-in analog scale.
It’s lightweight, but adult supervision is recommended for outdoor tools.
Yes. Its compact shape makes it easy to clip or tie.
Yes. Many users find the loud tone useful for training sessions.
No. All functions are mechanical.
It’s made from ABS, known for being lightweight and sturdy.
You receive one 3-in-1 survival whistle.
