Falli

Go to a premium drop zone where you can test jump audibles for free and be sure they are tested before leaving production.

Not so sure, whether environment friendly products with rechargeable batteries are "bad" or have "problems". Like all rechargeable products they last 500 charging cycles before the capacity going down. If you charge every 2-4 weeks these products last more than 10 years.

Well, in the 21th century single use batteries should be gone as well as most of the plastic packaging. A dealer would know about GEMINI...

If you read it correctly, the Mercury family has an easy to use Menu system, rechargeable batteries and are lightweight and small. If you ever tried to change the alarms in the plane, you know the advantage of a menu system instead of an App only model. The Crimson has 4+ Freefall alarms and canopy alarms. Also an optional app and both have the GEMINI technology where future altimeters can communicate over an encrypted bluetooth channel with each other.

If you have a G4 Helmet, which is very tight, you want to have a very small unit. Not everybody wants canopy alarms.

https://alti-2.com/products/sports/mercury-crimson/

Bought the ATLAS a while ago because my instructor from the PD Factory team recommended it.It has now 560 jumps on it. Love it. Much more functionality than other products and easy to use menu system. Lost my micro-usb cable and send them an email. Got an answer within minutes and a new cable for free in the mail some days later.