Main features: High-definition sound Unique, innovative, outstanding design Compatible for iPod/for iPhone/for iPad from every generation (Bluetooth) Smartphone compatible (Bluetooth or line-in 3.5mm) Compatible with a CD player or any other audio source through line-in 3.5mm Rechargeable battery Compact and portable, convenient to carry  Specifications: Product name: skull Bluetooth speakers Product weight: about 0.6kg Bluetooth version: 4.1 Total output power: 8W Bluetooth supports profile: A2DP Frequency range: 60Hz-15kHz Playing time: about 8 hours after fully charged Package included: 1 x Bluetooth speakers 1 x audio line 1 x charging line 1 x retail box