Shenzhen Heart Sea is online store for devices with wireless module ,we can offer a wide range of devices supporting 3G ,4G, GSM, GPS, Bluetooth, Wi-Fi or ZigBee technologies along with complete portfolio of accessories. We can provide technical support .The whole team trying their best to offer top-end service to all of our customers. In case you have any questions or suggestions, Pls feel free to contact us via e-mail.