Specifications: Comply with bluetooth 1.1 stardand (bluetooth) Support handset and handsfree profile Transmitted power: Class2 Wireless connection range:10m Operation frequency range:2.402ghz-2.480ghz Talking time:4hours, readiness time:120hours Digital formats supported: MP3/wma(mp3 player) Signal-to-noise ratio:87.2db External hard drive function: Yes Sound output mode: Stereo Audio additional features: Auto-power off Earphones type: Binaural Mfr estimated battery life:5hours continuous Charging time:3hours continaully Battery tape/capacity: Built-in lithium lon polymenr/3.7v,150mah Maximum imput power rating:5vdc,150ma Voice output power:55mw Voice output frequency:20hz-20khz Earphone impendance:16 2 Memory flash:128mb-1g The resilient glass, which is comprised of 11-layer materials, is introduced from polarized lenses produced by an American company polaroid. The flip-up lens is a material that blocks 100% of all uva, uvb, uvc and harmful blue light 1xac adpater/1x user manual/1xdisc/1xusb cable/1 the cloth for glasses Colos: Black/silver/white/yellow/green/blue/pink/military