28 hours of use. Volume limited to protect hearing. Bonus detachable cord! Wirelessly stream audio from a smartphone, tablet, or computer. Built-in rechargeable battery provides up to 28 hours of continuous playtime. Volume reduced to ensure safe listening levels. Bonus detachable 3.5 mm audio cable connects to any device with a headphone jack. Built-in microphone for talking to friends and family. Adjustable headband and padded ear cushions for custom fit. Foldable for portability. Contents: Bluetooth headphones, 3.5 mm audio cable, USB charging cable. Product specifications and colors may vary from photo. Packaging should be kept as it contains important information. Specs: Bluetooth Chipset: Alroha AB15222S 4.1. BT Distance: Greater than 8 m. Battery Capacity: 350 mAh. Playing Time: 28 hours at volume 80dB. Recharge Time: 90 minutes. Impedance: 32 ohm at 1 khz. Maximum Power Output: 100 mW. Driver Unit: 40 mm. Frequency Response: 20 Hz - 20 Khz. Sensitivity: 85-90db. This is not a toy. New material only. Content: Polyurethane foam. This product supports bluetooth (1.1, 1.2, 2.0 and 2.1 + EDR) wireless technology/enabled services with A2DP AVRCP, and secure simple pairing profiles. Warranty: 1 year limited warranty. Visit www.ekids.com/support for details. Valid only in USA. www.eKids.com. www.disney.com/frozen. Manufactured in China.