Not mentioned, nor on the Amazon description, or on the Garmin box: the attachment ideally works with the eTrex series, anyway works perfectly for my Etrex 30 (it is also well indicated on the Garmin website but I have been reassured that the amount!).
One complaint: the positioning of the carabiner as the picture seems logical but strongly constrains the strap. Fearing that the user ends up, I hung a ring fixed to the strap and carabiner on the ring. In addition, it facilitates handling.
