Fully assembled with the AAA battery, the pendant weighs 1.4 oz (41g).
The strap contains two parts, the strap itself and the Velcro used to fasten it to your wrist. Both parts are made of nylon. The plastic clip used to hold the pendant in place is made of PVC.
The EM24 Alert pendant is rated as “water resistant,” which means it can function properly if it become wet as a result of spraying, such as in the shower. However, if the pendant is submerged, such as in a bath, you may experience problems with the unit.