When evaluating vibration beds, prioritize the motor type and frequency range. For therapeutic use, look for brushless DC motors that offer a frequency range of 15-50Hz. Ensure the frame is constructed from reinforced carbon steel or aerospace-grade aluminum to handle constant oscillation without structural fatigue. Additionally, verify the weight capacity, which should ideally be ≥250kg (550 lbs) for bariatric compatibility, and check for noise reduction technology to keep operational sound below 50dB.