... . 3: compatiable with iPhone, iPad. 4: OEM welcome. anti-radiation retro handset for mobile, cell phone, Iphone, Ipad:With Volumn Control ... 4.Speaker diameter: 38mm5.Cord length:2m6.Plugs type:Φ3.5 mm DC plug 7.Dimension: 21*6*6.7 CM ... functions while calling4Receiver and microphone function5Volum control, button anti-radiation retro handset for mobile, cell phone, Iphone, Ipad (116DI)