Sennheiser AVX-ME2 SET - digital wireless set with lavalier mic and mini transmitter fully automatic

Product type: Wireless microphone system Package contents: Battery x 2 Microphone type: Lavalier Microphone direction type: Omnidirectional Harmonic distortion (THD): 0,1% Frequency range: 20 - 20000 Hz Transducer type: Electret Housing material: Metal Warnings: Do not open the unit housing. Battery technology: Lithium-Ion (Li-Ion) Battery lifetime: 15 h Battery lifetime: 4 h Weight: 87 g