Electronic pulse massager -never opened

HealthmateForever YK15AB TENS unit EMS Muscle Stimulator 4 outputs 15 modes Handheld Electrotherapy device | Electronic Pulse Massager for Electrotherapy Pain Management Pain Relief Therapy: Chosen by Sufferers of Tennis Elbow, Carpal Tunnel Syndrome, Arthritis, Bursitis, Tendonitis, Plantar Fasciitis, Sciatica, Neck Back Pain, Shin Splints, Hamstrings and other Inflammation Ailments Patent No. USD723178S https://www.amazon.com/dp/B00O7CM12W/ref=cm_sw_r_cp_api_glt_fabc_GJHF7EN37WQRF4RNY0ZV $30 at amazon Never opened and it is still with plastic wrap on it