【Heavy-duty Structure】 : The desktop microphone stand is upgraded version with extra positioning screw. This is our unique patent design. Make full use of the mechanics principle, this design can pull up spring to larger angle which can bear more weight than old version.the spring can pull up to 18cm. and the load weight can reach 3.3lbs/1.5kg. 【Cell Phone Holder】： This mic boom arm stands with a cell phone holder. Which means you can keep your hands free and have a steady video recording without trills when doing recording or living broadcasting. The inner diameter is 5.7cm, one of the side can be prolong to 9cm maximum. It is suitable for the width of smartphone between 5.7cm-9cm. 【Mic Shock Mount】: Professional suspension shock mount isolates most studio condenser mics from physical vibration,fits most condenser microphones, and support diameter ranging from 3.5-4.5 cm diameter Microphones . 【Adjustable Mic Stands 】:The suspension boom scissor arm stands can adjust freely around 180 degree angle. And the height can reach 70cm in total. Which can easy adjust the suitbale angel to the perfect position. The mic arm stands pack equipment with clear manual instruction. easy to assemble and carry.