With a productive earbud headphones factory on your service,Website: , Rocfly Blue Electronic Co.,Ltd is one of the famous earbud headphones manufacturers and suppliers. We can offer customized and best noise cancelling earbuds, and we are waiting for your contact.Specifications:Drive unit: 10mmFrequency response:20~20KHzImpedance:32ΩSensitivity:105±3dBDistortion:≤1% At 1KHzRated power:10mWMax power input:20mWCord length: 1.5 mPlug: 3.5mm 4-pole 3-chFeatures: -Self adjustable ear cup wearing comfortable.  -Compatible for MP3/MP4/CD/computer, etc.  -Inline mic/volume control available if needed.  -Buyer\'s specification accepted.  -Customized package available.  -Any colors are availableOur service:1. We provide samples for all models within one week.2. OEM logo and packaging are welcome.3. 1 year warranty for genuine quality defects.4. We provide OEM and ODM service. If you have other unique design, we can handle the whole development from outlook design, mechanical structure, electronics design and building of tooling.5. Under the terms of this warranty, if the product have a failure occurs under normal usage within warranty period, we will provide free/rework new products based on the proof-documents.