Warnings: do not use on open wounds or irritated skin; avoid prolonged use on the same spot; stop use if irritation or discomfort occurs; keep the device away from children. Usage instructions: choose hot or cold mode based on need (hot for relaxation, cold to reduce swelling and pain); apply to different body areas such as neck, back, shoulders; ed session duration 15–20 minutes per area; ensure the device is in a comfortable position during use. Supermarket