compact & portable :built-in voice mode heat level control :low ,mwdium, high 3 working moods : sleeping mode, inward direction, outward direction. BATTERY SPEC : DC 3.7V, 2600mAh. 15 minute auto shutoff 4 hours working time. Here it is— the Green Lion Neck Massager—your go-to source for comfort and relaxation right now. It guarantees efficiency and safety with an amazing 4-hour working time and a 15-minute auto shutdown option. Select from three different working modes, such as 'Sleeping' and dynamic 'Inward/Outward Direction' settings, based on how comfortable you are. By allowing for a customized warming experience, the integrated heat level control improves blood circulation and reduces muscular tension. Because of its small size and portability, you can carry it anywhere. A Type-C connector makes charging simple, and its 5W low power usage makes it affordable and ecologically friendly. The Green Lion Neck Massager is prepared to offer instant relief anytime you require it, with a default time of 15 minutes.