The guarantee obligations end in the following cases 1. In case of failure due to natural disasters (lightning, flood, earthquake, fire), improper operating conditions or user negligence; 2. in the event of failures due to illegal, unsuitable voltage sources, disruptions to the power grid; 3. Damage caused by foreign objects inside the device, sand, liquids (corrosion, oxidation), food, insects, etc.; 4. Failure to comply with the rules set out in the device’s instructions for use; 5. Damage caused by dropping or impacting the device after purchase or during transportation of the device by the customer; 6. The fault was rectified by an employee/person not authorized by the manufacturer.; 7. Seal on the antenna is broken