Geekbuying U8 Bluetooth Smart Watch Perfect fit for Android Smartphone Galaxy S5/S4/S3 Note3/Note2, HTC, Motorola, LG - Only Basic function for iPhone 5S/5C/5/4S/4 Material: Steel + Silicon Bluetooth Version: Bluetooth V3.0+EDR Bluetooth Protocol: A2DP + HFP 1.5 + HS P 1.2 Range of Frequency: 2.4GHz spectrum Transmitting Range: &gt;=10m