Samson Technologies Airline Micro Lavalier System Wireless camera system Ideal for all video camera applications, including DSLR video shoots Fully rechargeable with lithium-ion batteries. - Over seven hours of operation on a single charge Double-docking station that provides USB DC power and 3.5 mm balanced audio output for the receiver AL2 beltpack transmitter features an LM10 omnidirectional lavalier microphone, plus single-button operation for power, mute, and volume