FabSeasons Unisex Winter Skull Cap/Beanie/Hat with Rechargeable LED Lights & in-Built Wireless Bluetooth Headphones - for Outdoors/Trekking/Running

Connectivity is too good and coverage is magnificent, i could listen the songs in another bogey of train without any disturbance. Battery could last up to four to six hours if use continuously. Just deducted one star because of the thick material of cap. It could have been made with simple cotton folded material. Receiving calls are also very clear.