Part of the COOLiFY 2S collection 5,000mAh wearable neck air conditioner features three modes namely cooling, fan, and heating, for customized comfort Provides 3-5 hours of cooling, 11-28 hours of fan use, and 4-6 hours of soothing warmth Gentle heat wraps your loved ones in warmth, easing neck tension and melting stiffness making it a comforting gift Gentle warmth boosts circulation and relaxes tight muscles–ideal for long workdays or extended phone use