You are downloading the Voxer XAP file v0.9.30.0 for Windows Phone. Voxer is a free and useful Social app: Turn your Windows Phone into a walkie talkie with Voxer. People can hear your voice in real-time as you talk, and every message is recorded - in case ... You can now download the offline XAP file to install & try it.
Download Locations for Voxer 0.9.30.0 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Voxer XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.