Warranty & Compatibility & Note: Worry-free 12 months warranty; Compatible with Motorola CP BPR CLS DLR DTR RDX RM VL series radios; Including R2 CP100D CP185 CP200 CP200D BPR20 BPR40 BPR40D CLS1410 CLS1110 DLR1020 DLR1060 DTR550 DTR600 DTR650 DTR700 RDU2020 RDU2080D RDV2020 RDV2080D RDU4100 RDU4103 RDU4160D RDU4163D RDV5100 RMU2040 RMU2043 RMM2050 RMU2080 RMU2080D RMV2080 PR400 VL50 and more; This is not Intrinsically Safe earpiece, This is not water-proof earpiece. Professional Acoustic Tube Module: Super quality TPU acoustic tube provide durability and flexibility; Ear-hook and elastic coil made by precise forming technology makes your wearing more comfortable; Acoustic tube joints made of anti-cracking & wear-resistant plastic bring reliability and prevent scratching; High performance micro speaker and acoustic tube ensure sound to be transmitted clearly even in loud environment; A variety of accessories meet different ear wearing choice. Clear Sound Transmission: