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