Sony on Tuesday rolled out a broad-based update to its earphones with a new model in each of its key categories. The DR-BT160 headset is targeted at runners who want to eliminate cables over Bluetooth without losing a stable fit or phone support. The in-ear buds are worn with over-the-ear hooks and a behind-the-head band; while functioning as a full A2DP stereo Bluetooth device for cellphones, c
