Feature: 1. Applicable: Air duct headphones are suitable for portable music players such as for iPhone, for Galaxy and for NOTE series, for Nexus, for HTC, for iOS tablet, for Laptop, Tablet, etc. 2. Ergonomic Design: Air tube earbuds feature ergonomic soft silicone ear tips that fit perfectly, won't fall off and can effectively isolate external noise, perfect for travel, running, fitness or gym. 3. Radiation Free: The radiation free headphone uses a non magnetic field radiation metal cavity and trachea to reduce radiation and is suitable for children, pregnant women, etc. 4. Binaural Design: The 3.5mm air tube headset uses binaural earbuds, stereo sound quality, enjoy excellent sound quality, and can also use the sound controller to manage music and calls. 5. Portable: The binaural air tube earbuds can be connected to any mobile device compatible with headphones, and the lightweight design provides great convenience for you to carry. Specification: Item Type: Air Tube Earbuds Material: Silicone, PU Line Length: Approx. 120cm/47.2in Plug Diameter: Approx. 3.5mm/0.14in Horn Diameter: Approx. 10mm/0.4in Impedance: 32Ω Appearance Type: Earplugs Technology Category: Capacitive Transmission Method: Wired Sensitivity: 113dB. Package List: 1 x Air Tube Earbuds4 x Replacement Earplugs Note: Please allow some errors due to manual measurement.