These adorable headbands are fun to wear, washable, and kids will love the characters and colors. They won't be bothered by earbuds that don't fit properly. Features: Previous song, next song, volume up, volume down, play, pause, answer calls, make calls, activate Siri, talkback microphone. Soft, washable headband; slim speaker limited to 104 dB to protect little ears. No more earbuds getting stuck in ears or bulky headphones that don't fit well. The comfortable, flexible headband stays in place and won't interfere with car or airplane seat headrests, allowing your child to sleep comfortably during travel. They can also be worn over the eyes as a sleep mask for naps. Bluetooth version 5.0, compatible with Android and iOS. Built-in rechargeable lithium battery supports approximately 9-10 hours of use after a full charge. Specifications: Material: 100% polyester fiber. Style: Hippo Panda, Fox, Dinosaur. Product size (L x W): approximately 25 x 10 cm, suitable for head circumference up to 54 cm. Bluetooth specification: V5.0+EDR/A2DP/AVRCP/HFP. Frequency range: 2.4026GHz-2.480GHz. Transmission distance: over 20 meters. Audio channel: Stereo. Speaker parameters: 24 Ohm/30mm. Speaker power: 10mW x2. Signal-to-noise ratio: 104dB. Bluetooth version: 5.0. Battery capacity: 150mAh lithium battery. Playtime: 10 hours (tested on iPhone at 100% volume). Talk time: over 9 hours. Charging time: approximately 1.5 hours.