Purchased from Soundhouse in November 2023. It has been stored in a constant desiccator and is in perfect working order. Quoted from the sales site below: Features A thin, tube-shaped measurement condenser microphone that minimizes the impact on the sound field. It has a sturdy and compact all-metal housing. Includes a 5/8 to 3/8 adapter screw microphone holder and a carrying pouch. Specifications ■Condenser Microphone ■For Measurement ■Omnidirectional ■Frequency Response: 20 - 20,000 Hz ■Phantom Power: 12-48V ■Length: 133mm ■Weight: 88g ■Accessories: Microphone holder (with 5/8 to 3/8 adapter screw), carrying pouch