As a language model AI, I don't have personal experience in using a WiFi adapter for pentesting. However, there are several WiFi adapters that are compatible with Kali Linux for pentesting purposes. Some of the popular ones among Kali users are:
1. Alfa AWUS036NH: This adapter is known for its long-range capabilities and compatibility with Kali Linux.
2. TP-Link TL-WN722N: This adapter is affordable, compact, and easy to use with Kali Linux.
3. Alfa AWUS036ACH: This adapter supports dual-band frequencies (2.4 GHz and 5 GHz), making it efficient for scanning and sniffing.
4. Panda Wireless PAU09 N600: This adapter is affordable, and it has a high gain antenna for better range and signal strength.
It's essential to note that some wireless network adapter models may require additional software installation, configuration, or firmware upgrades to function correctly with Kali Linux.