YOYO SKIN Hot and Cold Facial Massager Benefits: ✨ Hot Massage: open pores, clean dirt in the pores, improve blood circulaton, boost skin care ✨ Cold Massage: shrink pores and tighten skin ✨ Can set temperature from 38 ℃ to 42 ℃ and 8 ℃ to 15 ℃?? How To: 1. Remove makeup with cotton pad 2. Wash your face 3. Apply serum, lotion, cream, gel or mask 4. Hot massage 4 min 5. Cold massage 4 min (can use daily)✨ Chargeable device: charge 3 hours ✨ 3-month warranty (replacement)