Our beanie hat earphone adopt advanced Wireless 4.2 version with multi-point technology, simultaneously connect with 2 mobile devices, high-sensitive inbuilt mic with noise canceling technology, deliver crystal clear stereo sound. Inbuilt 180mAh rechargeable battery, 5Hrs unstoppable HD sound music while only 2.5 Hrs fully be charged. Multi-functions can be operated via pressing button. Premium double soft knit with 55cm/21.66inches adjustable circumference to provide the maximum comfort and keeps you away from the cold in any chilling weather, which ensure that your hair will not be ruffled by the cold wind and also fills up your personal space with music and infinite joyful! Suit for versatile lifestyle indoor, sports-active outdoors, or everyday usage without compromising the convenience. *Warm Winter Hat & Enjoy Music: Knitting beanie hat keeps you away from the cold in any chilling weather and makes sure that your hair will not be ruffling by the cold wind and also fills up your personal space with music and infinite joyful! To detach the speaker before hat washing. *Crystal Clear Sound: Latest Wireless 4.2 version with multi-point technology, simultaneously connect with 2 mobile devices with high quality and high speed signal transmitting, offering impressive crystal clear stereo sound with the 32.8ft maximum distance connectivity. Adopt high-sensitive microphone with noise cancellation technology to reduce ambient noise, grasp the details of voice and offer crystal clear sound even in a noisy environment. *5 Hrs Unstoppable Music and 2.5 Hrs Fully Charged: Inbuilt with 110mAh rechargeable battery and equipped with USB charging cable, 5Hrs unstoppable HD sound music while only 2.5 Hrs fully be charged via included USB charging cable. *User Friendly and Multi-use: Featured with MFB (Multiple function button) Button and /- (Volume/Track adjustment) Button, simply and quickly fulfill almost all functions like answer/end/redial a phone, play/pause, pairing, power on/off, etc. Easy operation and brings you much convenience. *Snugly Fit and Widely Used: Feature premium double soft knit with 55cm/21.66inches adjustable circumference to provide the maximum comfort, delicacy, and secure-fit mobility for most versatile lifestyle indoor, sports-active outdoor, or everyday usage without compromising the convenience. Note: 1.Transition: 1cm=10mm=0.39inch 2. Please allow 1-2cm error due to manual measurement. Plus make sure you do not mind before you bid. 3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Brand: KOCASO Product Type: Wireless 4.2 Smart Cap Chip: JL6907 Driver Unit: φ30mm Frequency Response: 20Hz-20KHz Impedance: 32Ω Sensitivity: 95dB Operation Range: 10m/32.8ft Battery Capacity: Rechargeable 180mAh li-polymer Battery Music/Talk Time: 4-5Hrs Fully Charged Time: 2.5Hrs Standby Time: 24Hrs Cleaning: Washable (To Detach the Speaker Before Hat Washing) Material: Acrylic Fibers Color: Black USB Charging Cable Length: 30cm/11.81inches Circumference: 55cm/21.66inches Item Size: 19.5x23.5x1.5cm/7.67x9.25x0.60inches Item Weight: 103.5g/0.23lbs Package Size: 12x11x5cm/4.73x4.33x1.97 inches Package Weight: 150g/0.33lbs