we are a major manufacture in designing and producing bluetooth headset, bluetooth dongle(adapter), irda wireless connection and some bluetooth series products. we have our factory in shenzhen ,china. email: david at sun-usb.com msn: sun-usb-david at hotmail.com ------------------------------------------------------------------ motorola 688 series handfree bluetooth specification:version 1.2 bluetooth profile supported:headset and handsfree profiles range of frequency:2.4ghz spectrum dimensions:50.8mm(h)*42mm(w)*22mm(d) nominal charging time:within 3 hours talk time:up to 6 hours standby time:up to 200 hours weight:24 grams package contents: a) adapter: 1pc b) cd driver: 1pc c) color box: 1pc