ITEM NAME:Most Popular Bluetooth Hands-Free Phone Music Cap Autumn And Winter Style Product Description Description: Features: 100% brand new and high quality. Knitted material, fashion and keep warm with answer the phone in winter. Set-in MIC, available for cell phone to transmit the speaking phone to your audio devices directly so that the user can hand free answering phone up via the device. Set-in Li-ion chargeable battery, charge via USB Cable, long stand-by time. Specification: Bluetooth: V3.0+EDR Frequency: 2.4026ghz-2.480ghz Transmission distance: 10m/32.8 feet MIC Transmission distance: ≠¤1m/3.28feet Battery Built-in: 3.7V/160mA Li-on battery Charging Time: 2h Charging times: 1000 times Charging voltage: DC 5V Standby Time: About 60h Working Time: About 3.5h Bluetooth Name: Magic Hat/Bluetooth Hat/BT-03S Color: Black, Gray, Blue, Rose Red, Stripe Net weight: approx. 83g Product size: approx. 200*200*25mm/7.87*7.87*0.98'' Circumferance: 43~68cm Package with OPP bag. Note: The hat can be washed after pulling the battery. Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Included: 1 X Bluetooth Hat 1 X USB Cable 1 X User Manual.Bluetooth: V3.0+EDR. Knitted material, fashion and keep warm with answer the phone in winter. Included: 1 X Bluetooth Hat. Color: Black, Gray, Blue, Rose Red, Stripe. Set-in MIC, available for cell phone to transmit the speaking phone to your audio devices directly so that the user can hand free answering phone up via the device.