Size: 21.5 * 5.8 * 5 cmLine length: 45 cmMaterial: ABS grind arenaceousFeatures: 1， vintage design 2， comfort calling3， dial telephone， allowing access to mobile phones function 4， eliminate as much as 99% of the radiation absorption 5， noise reduction system 6， provide the 3.5 mm plug 7， with all the mobile devices， the adapter eight as parts of engineering， engineering with all computers， USB adapter， bypass cable accessories 9， 10， colorful variety of colors to choose high quality speaker and microphone 11. Support for the vast majority of the market with 3.5 mm headphone jack’s cell phoneSpecifications: 1， frequency: 20-20000 hz， 2. sensitivity: 111 db (a) plus or minus 3%3， impedance: 150 ohm， 4. horn diameter: 38 mm 5， line length: 2 m (straight) 6， plug type: Φ 3.5 mm DC plugNote: the maximum sound volume.Packing: 1pc purple telephone receiver Packing size: 25 * 9 * 7 cm