ND DD3 4 Modes Adjustable In-Ear Earphones HiFi Sound Wired Headphones,No Mic/Tuned Version - Blue 4 Adjustable Sound Modes: Featuring adjustable sensitivity modes (107dB/103dB/107dB/109dB),these earphones allow you to switch between different sound profiles for a personalized listening experience Premium Sound Quality: Equipped with 10mm dual-chamber dual-magnetic dynamic drivers,these earphones deliver rich,detailed audio across all frequencies. Perfect for music enthusiasts who demand high-fidelity sound High-Quality Cable: The 1.25-meter silver-plated oxygen-free copper cable ensures optimal signal transmission with minimal distortion. Featuring 3.5mm metal plug for wide compatibility with most audio devices 2-Pin Detachable Design: Featuring a standard 0.75mm dual-pin design and a 2-pin limited slot for interchangeable headphone cables,users can choose to replace them with other Hi-Fi cables according to their needs or upgrade to Bluetooth-compatible headphones by installing a Bluetooth-compatible module Specifications: Model: ND-DD3 Frequency response range: 20-40000Hz Sensitivity: 107dB/103dB/107dB/109dB (Mode 1/2/3/4) Impedance: 45Ω/35Ω/35Ω/34Ω (Mode 1/2/3/4) Unit type: 10mm dual-cavity dual-magnetic special-shaped dynamic unit Cavity material: CNC aluminum alloy + PC resin Pin type: 0.75mm 2Pin Plug type: 3.5mm metal plug Wire core type: oxygen-free copper silver-plated wire core Wire size: 1.25m±0.05m Wearing method: over-ear + in-ear Package included: 2 x Earphone Head 1 x Connection Cable 6 x Pairs of Eartip Cap 1 x Ejector Pin 1 x Storage Bag 1 x English and Chinese User Manual