1,4 aa /3W high quality speaker 2,Built-in rechargeable battery 400mAh 3,Bluetooth 2.0 ... 400mAhCE,ROHSOur major products:Headphones, speakers, radios, multifunctional items, toys, outdoor sports equipment, home appliances, household items, garden items, clocks, car ... Looking forward to establish long term business relationships with you . Wireless Bluetooth speaker