Retro Telephone Handset 3.5 Mm Classic Cellular In Black : : Noise reduction system, high-quality speakers and microphone for better conversation comfort Buttons: simple and touch buttons, answer and end calls, convenient and easy to use High-definition speaker and microphone: There is a button on the side of the microphone to adjust the volume Soft Touch Outside: Appropriate and Move away from the phone to eliminate up to 99% of radiation absorption Compatible with mobiles and computers: compatible with most 3.5mm devices Compatible with all mobiles and computers Specification: Model: xsl-560 Material: ABS Plug: 3.5mm Frequency range : 20-20000Hz Sensitivity: 111dB 3% Impedance: 150 ohms Speaker Diameter: 38mm Length: about 1 meter long Connection plug: four 3.5 mm tips adjustment: button Function: Noise reduction system to improve the comfort of conversations. sizes: 21 x 5 x 6 cm / 8.27 x 1.97 x 2.36 inch contains: 1 telephone handset