Features 1.APPLICABLE MODEL: Interphone volume knob is suitable for DP4800 DP4801Xir P8600I P8668 P8608 DGP8050 DGP8550E XPR7550 xpr7580e and so on. 2.DURABLE MATERIAL: Interphone volume control knob replacement is made of premium ABS material, durable and safe for long term use. 3.STURDY AND DURABLE: Two way radio control knob is made of high strength material, which means it has excellent durability, and the shell is sturdy to meet your needs of long term use without replacement. 4.EASY TO INSTALL: Intercom volume knob is very easy to install, simply put the cover on and it is ready to use, perfect for your practical use. 5.CONVENIENT USAGE: With its user friendly design, easily access and control your interphone or car stereo volume for added convenience in daily activities. specificationItem Type: Switch Knob_x000D_ Material: PC_x000D_ Application: for DP4800 DP4801Xir P8600I P8668 P8608 DGP8050 DGP8550E XPR7550 XPR7580E etc. PackageList2 x SwitchKnob