Specifications: Product Name: three heads and one wheat + self-contained integrated headset Collar clip material: aluminum alloy SNR: > 78dB SPL Sensitivity: - 34dB + 2dB (0dbv / pa.1khz) Frequency response: 65Hz-18kHz Net product volume: 1.5m: about 15.3g. 3M: about 23.5g Product interface: 3.5mm interface, type-C interface Product interface: 3.5mm interface and 3 kinds of joints. Supporting equipment: mobile phone, tablet computer, SLR camera, camera, little bee, small speaker, sound card, etc. Product list: microphone set x 1 Note: 1.Please allow slight size deviations due to manual measurement,measuring methods and tools. 2.The picture may not reflect the actual color of the item because of different photographing light and display monitor.Thanks for your understanding.