The temples are important acupressure points on the human head. When people massage the back of their heads continuously for extended periods, they often experience dizziness, headaches, and swelling and pain in the temples. These are signs of brain fatigue. Massaging the temples can be very effective at these times. Massaging the temples can provide beneficial stimulation to the brain, relieve fatigue, refresh the mind, alleviate pain, and help maintain focus. This product uses heat, chatter, and microcurrent pulses on both sides of the massage head to massage and stimulate the temples. It can also connect to a phone or other audio source via Bluetooth, allowing you to listen to music while massaging to relieve tension, fatigue, dizziness, and headaches. Operating Mode: chatter Electrotherapy + Heating Operating Time: 15 minutes for massage / 60 minutes for Bluetooth Battery Type: Rechargeable Li-ion Battery - 3.7V * 360mAh Operating Modes: Three modes Intensity Adjustment: Five settings Color:Black Material:ABS Package Contents: 1 * sleep aid massager set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.