Caseco Bluetooth Beanie Knit Slouchy Winter Hat with Wireless Bluetooth Headphone Headset Earphone Music Audio Hands-free Phone Call for Sports Fitness Gym Exercise for iPhone 6S, iPhone 7, Android Perfect for listening to music; For him and for her Rechargeable using Micro-USB cable; Compatible with Bluetooth enabled devices Removable Bluetooth module for washing Built-in microphone for answering and making phone calls; Status alerts Specifications: Bluetooth version: 4.0; Frequency: 2.4022.480 GHz; Range: 10 m / 33 ft; Mic range: 1 m / 3 ft; Battery: Li-ion 3.7V/120mA; Charging time: 2 hours; Playback/talk time: 6 hours; Standby time: 60 hours