When evaluating wireless game consoles, prioritize the CPU and GPU performance to ensure smooth gameplay at high resolutions (4K/60FPS). Key specs include RAM capacity (at least 2GB-4GB for retro consoles, higher for modern systems) and Internal Storage (EMMC or SSD). For wireless connectivity, ensure the console supports Bluetooth 5.0 or 2.4GHz wireless technology to minimize input lag, which is critical for gaming experience. Additionally, verify the battery capacity (mAh) for handheld wireless units to ensure a minimum of 5-8 hours of continuous play.