Amplitude (stroke length), stall force, and motor quality. Evaluates how deeply and effectively the device can penetrate muscle tissue for therapeutic relief.

Operating noise level (dB) and handle vibration. Lower noise and less hand fatigue make for more comfortable, longer sessions.

Battery life, charging speed, weight, and travel-friendliness. Considers TSA compliance and ease of carrying to gym or travel.

Number and quality of included attachments, speed settings, and additional features like heat/cold therapy or app connectivity.

Construction materials, durability, ergonomic handle design, and warranty coverage. Evaluates overall build solidity and expected lifespan.