Sony Ericsson complemented the T715 with the addition of a new Bluetooth headset useful for most phones. The VH310 is built for longevity with about 11 hours of continuous talk or 500 hours of standby. Comfort is also a concern as it ships with three different ear tip sizes and two different ear hooks to accommodate most wearers; at 10 grams it also shouldn't weigh too heavily when in place.
