1.This is version xpr3500e microphone with heavy duty construction, compatible with XPR3000 XPR3300 XPR3500 XPR3300e XPR3500e XPR 3300 XPR3500 XPR3300e XPR3500e DP2000 DP2400 DP2600 DP3441 DEP550 DEP570 DEP550e DEP570e XiR P6600 XiR P6600i XiR P6608 and more. 2.Heavy duty construction: PMMN4071 PMMN4071AL radio microphone with heavy duty construction and impact-resistant engineering Polycarbonate plastic housing, this speaker microphone is built for tough mission critical use and is built to withstand knocks and bumps. 3.Super strength cable: Speaker mic with TPU (Thermoplastic polyurethane) rubber jacket bring super bending strength, abrasion resistance and scratch resistance. Strain relief structure made of TPU rubber bring stronger bending strength and longer lifespan. 4.Clear sound transmission: Handheld mic with high quality micro speaker, noise cancellation microphone, high purity copper wire and anti-Interference circuit design, this speaker microphone enable voice to be transmitted clearly even in loud environments. 5. Speaker Mic: Clip-on speaker mic combined with PTT (Push to Talk) button, 3.5mm audio Jack for discreet communication.