Usage Tips:Made of ABS material, the handset is of simple but fashionable. It is compatible for cell phones and computers with 3.5MM interface. With built-in hanging up and volume keys, easy to use. Give you excellent audio quality. It will be a good choice for you.Features- Brand: UKCOCO.- Color: Black.- Material: ABS.- Size: About 22.00X6.50X6.00cm/8.65X2.55X2.36in.- Interface: 3.5MM.- Frequency: 20-20000Hz.- Sensitivity: 111dB3%.- Impedance: 150 ohm.- Speaker diameter: 38mm.- Line length: about 1 meter.- Excellent audio quality, noise reduction system, improve comfort during the call.- Built-in hanging up and volume key. Easy to adjust the sound volume when making calls.- Simple color and retro style design, easy to be favored by all ages of customers.- Reduces radiation at your head, it is suitable for 3.5MM interface for both phones and computers.- Fine workmanship with smooth surface and exquisite details, good hold feeling in hands.Packing list: 1 x UKCOCO Handset