Product Name: Tablet Headset Combo Headset Mobile Phone Headset Trss Connector 3.5mm Plug Model NO.: SN140 Jack Type: Plug-in Jack Diameter: 3.5mm Function: Multimedia, Microphone Usage: Computer, Mobile Phone Communication: Wired Type: Electret Earphone Color: Black Wire Material: PVC Trademark: MITECHNIC Transport Package: 40 Units in One Carton Specification: 63X41X39CM Origin: China HS Code: 85183000 Product Description This new kind of headset has great quality, and it can be greatly used in tablet,Ipads, Iphone and so on. It has good sound.Outstanding:Comfortable earpadAdustable headband, different uses can adjust different length of headband to wear comfortable.High quality skin of earpad and headband,which can be used many years in hot humid climate.Specification:EarphoneSensibility:112dB±3dBImpedance:100 Ω±10%Frequency range:20-20KHzOutput Power:20mwMicrophoneLoudspeaker diameter:Ø50mmSensibility:-49db±2dbDirectional:UnidirectionalInsert diameter:Ø3.5mmCord Length:2.0 metersConnector:3.5mmTRSS plugWeight: 275gPackage We use blank box for the sample, and bulk package for the order. We package 40 units in one carton,and the size of the carton is: 64CM*38CM*41CM, and the gross weight is about 14.2KG, and the charge weight by DHL is about 21KG.Warranty 2 years warranty, we are responsible for shipping freight.