Come and see our amazing products. Equipped 350mAh battery in the portable magnetic charging box, which can support 5 times fully charging for the wireless earbuds. Never worry about low battery when you are out all day. And each earphone has Built in 40 mAh lithium polymer battery, enjoy about up to 4 hours of premium quality music playtime and 3 hours talk time after fully charged Pls confirm with us about the packing info, stock color and exact production time before placing your order.