Specifications:

• Bluetooth MP3 Sunglasses Supported
• USB interface Supported
• Signal-to-noise ratio:87.2dB
• Compatible Playback Modes:Random play
• External hard drive function
• Digital formats supported: MP3/WMA
• Audio Additional features:Auto-power off
• Mfr estimated battery life :5hours continuous
• Charging Time:3hours continaully
• Battery Type/Capacity: Built-in Lithium-ion Polymenr/3.7v,150mAh
• Maximum imput power rating:5VDC,150mA
• Voice output power:55mW
• Voice output frequency:20Hz-20Khz
• earphone impendance:16 Ω*2

Accessories:

• AC Adpater
• User Manual
• Disc
• USB Cable