Heavensea Technology Co., Ltd is a GPS manufacturer, experienced in OEM and ODM service. Each month we deliver 50,000 GPS units and 100,0000 optional accessories to US, Europe and Southeast Asia. One of the earliest GPS suppliers in Mainland, China! We began to supply Bluetooth GPS receivers in 2004, when our competitors were obstructed by software problem. Currently, we have six models independently developed by ourselves. Eight types of waterproof bags Waterproof bag is an accessory for GPS initially. Later, we developed more designs for mobile, MP3 and etc. These devices could be used while inside. We also trade other local advanced electronic products. CE/FCC certificates and one-year warranty for all products! For more details, contact us today! www.heavensea.com.cn