Warranty & Compatibility & Note: 12 months worry-free warranty; Compatible with Kenwood radios NX TK series; Including NX-200 NX-200G NX-210 NX-210G NX-300 NX-300G NX-3200 NX-3300 NX-410 NX-411 NX-5200 NX-5300 NX-5400 TK-2140 TK-2180 TK-3180 TK-5210 TK-5210G TK-5310 TK-5310G TK-5220 TK-5320 TK-5330 TK-5410 TK-5430 TK-290 TK-390 TK-380 TK-385 TK-480 TK-481 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: With professional acoustic tube module, high quality micro speaker, noise reduction microphone, high purity copper wire cable and anti-Interference circuit design and our great assembly skills, this earpiece ensure sound to be received and transmitted clearly even in loud environment. | Super Strength Cable Module: TPU (Thermoplastic polyurethane) cable bring super bending strength, abrasion resistance and scratch resistance; Cable internally reinforced by high tensile strength fiber and Kevlar fiber bring excellent tensile strength; Strain relief structure made of TPU rubber bring stronger bending strength and longer lifespan; This cable module is built for mission critical use. | High Strength Precise Connector: With TPU (Thermoplastic polyurethane) rubber jacket, engineering Polycarbonate housing, internal hard core and gold-plated POGO-pin, assembled by precise soldering technology and molding technology, the connector of this earpiece is built for stable connectivity and excellent operating life.