Attention: Welcome to my shop! We ship the product from China, the delivery time is 7-14 days! Specification Bluetooth version: V4.2+EDR Frequency: 2.4026GHz-2.480GHz Transmission distance: 10M / 32.80ft Transmission distance of Mic: 1M / 3.28ft Li-ion battery: 3.7V/160mA Charging time: 2 hours Number of charge: > 1000 times Charging voltage: DC 5V Standby time: 60 hours or so Continuous working time: about 3.5 hours Bluetooth name: Avanca BM/Bluetooth Hat/BT-03S (you may search one of them) Color: Gray, White, Black, Blue, Yellow, Red cap weight: 87g / 3.05oz Size: Fits for head circumference about 43 to 68CM Feature 1.V4.2+EDR Bluetooth version, available for most of devices with Bluetooth function. 2.Elastic knitted material, warm, soft and stylish design. 3.Protects you from cold winter and will also allow you to listen to music and talk while doing variety of other activities. 4.Built-in microphone, available for cell phone to transmit the speaking phone to your audio devices directly, hands-free answering. 5.Built-in Li-ion chargeable battery, charge via USB cable, long stand-by time. 6.Headphone can be taken off so that you can wash the hat. 7.Allows you to keep your music where it belongs - in your ears. 8.You will look great and keep warm while listening to your favorite music. Keep the sound track to your life playing all the time. 9.Perfect for traveling, waiting for the bus, jogging in the cold or just rocking out in your bedroom. User tips: The music Bluetooth hat is designed to be reused and it is washable. Therefor the icon panel on the hat is not fixed to the buttons. If you the icons do not match the control buttons, please manually adjust them. The control panel is perfectly positioned if you see full indication light from the light window. Press the ON/OFF button for 3 seconds, the device is open once "BLUE" LED slowly flash. Press 3 seconds again, device close. Press the ON/OFF button for 5 seconds while RED & BLUE LED slowly flashing alternately, device is on pairing mode. Due to different Bluetooth module, you may search one of the Bluetooth name: "Magic Hat", "Bluetooth Hat", "BT-03S" on the Bluetooth device list of your smart phone, no password needed. Make sure you enable both call audio and media audio on your Bluetooth set up menu on your phone. You might have to manually adjust the hat to find the Micro USB charging port because the Bluetooth hat is washable. Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package 1 * Bluetooth music hat 1 * USB cable 1 * User Manual