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Mi Jia APP Neck Massage Instrument Heat Therapy Low Frequency Pulse Heat Therapy Six Head Speech Gift Cervical Intelligen Product Name: Multi functional cervical massage device Material: PC+ABS+food grade silicone+stainless steel sheet Product size: 163.2mm * 135.5mm * 87.3mm Manual measurement may have errors, please refer to the actual situation Power: Approximately 5W Input/output: DC5V/1A Battery capacity: 1200mAh Battery type: 103040 polymer battery Charging time: about 2 hours Usage time: Heat treatment is turned on for about an hour (all functions are turned on) Interface type: TYPE-C Control mode: Mi Home APP/body buttons Voice Assistant: Intelligent Voice Broadcast Pulse frequency: 1-20Hz Pulse width: 100 μ s Pulse waveform: Square wave Heating temperature: 37-43 ℃ Heating method: PI Red lights: 4