Using high-quality materials with guaranteed quality. Sensitivity: -36dB ± 2dB. Overall dimensions: f 32mm6mm. Imported diaphragm: 6 micron polyester gold plated. Power supply voltage: 48V. Please Make sure it’s 100% right. Please leave note for your special request e. If not, please let us know before we sent you the package, or we will not be responsible for any loss. Hope you could understand. All package need to wait 30 days, Please take care it. All package need to. Please take care it. But the items must be back in factory condition. Please keep in touch with us and double check the return address before you return it. If is item is defective in 12 months, you can return it to us. We will send you a new replacement after receiving the defective item. Feedback is very important to us.