Warranty & Compatibility & Note: 12 months worry-free warranty; Compatible with Motorola radios SL300 SL3500e SL7550 SL7550e SL7580 SL7580e SL7590 SL7590e SLN 1000 TLK 100 TLK 110 (SL 300 SL 3500e SL 7550 SL 7550e SL 7580 SL 7580e SL 7590 SL 7590e SLN1000 TLK100 TLK110); This is not Intrinsically Safe earpiece, Don't use it in hazardous areas; This is not water-proof earpiece, Don't use it under humid environment and rainy day. Classic Earhook: Classic and comfortable G shape Thermoplastic Elastomer earhook produced by precision molding technology which bring earhook more shape-stability and durability; Earbud rod is rotatable to fit right or left ear and adjustable vertically to fit different size of ears. Clear sound transmission: With high quality micro speaker, noise reduction microphone, high purity copper wire and anti-Interference circuit design, this earhook earpiece ensure sound to be received and transmitted clearly even in loud environment. Super St