SPECIFICATIONS Working voltage: 3.7V Working time: 10-20-30 minutes Working current: 5MA Work Mode: Auto Type: Anti Snore Wrist Watch Number of Pieces: One Unit Maximum power: about 20MW Material: ABS, PC material, strap silicone material Item Type: Sleep & Snoring Frequency: 10KHZ Features 6: Relief Relax Hand Massage Pressure Soothing Microcurrent Sleep Aid Watch Features 5: Microcurrent Pulse Sleeping Anti-anxiety Insomnia Hypnosis Device Features 4: Relief Relax Hand Massage Pressure Soothing Sleep Aid Watch Features 3: Sleep Aid Watch Microcurrent Pulse Sleeping Anti-anxiety Insomnia Hypnosis Device Features 2: Improve Sleep Hypnosis Aid Watch Relief Anxiety Insomnia Care Features 1: Sleeping Aids Wristband Microcurrent Pulse Better Sleep Instrument Continuous use time: about 15H Charging voltage and current: 5V280MA Charging time: about 20 minutes Battery capacity: 150mAh/DC 5V