Xenda Universal Car Mount Vehicle AC Air Vent Cell Phone Holder for HTC One (All carriers including AT&T, Sprint, T-Mobile and Unlocked) XENDA(TM) Car Air Vent Phone Holder. Compact and lightweight design, perfect travel companion. This solution is designed for use only with vehicle's having horizontal air vent louvers. 360 degree rotation support holder. Side arms expand up to 4". High quality rubber stops the device moving whilst mounted.