Name: bluetooth glassescolor: black, silver, red, blue, camouflage red, camouflage blueversion: v4.1technical parameters:1: operating frequency 2.4ghz-2.480mhz1: meet the bluetooth v4.1 standard, true stereo, support a drag two functions2: wireless connection range: 10 meters3: transmitting power: glass24: support headset & handsfree profiles5: headset built-in rechargeable lithium battery 120mah6: headset talk time: 6 hours standby time: 150 hours, listening to music 4-5 hours or so7: stand weight is very light, suitable for a long time to wear without fatigue;8. receive sensitivity <-80dbm9. compatible with a variety of bluetooth devices, ipad, laptop and so on10. english voice prompts, with camera functionstandard accessories: host + usb data cable + manual + glasses bag + box