Package contents and purpose Complete kit: one stainlesssteel sounder and an optimized base designed to or upgrade the sounder assembly on compatible reels. Designed specifically for use with Forzillion Performance TW and Alphas Air TW reel families and Sound Svcompatible configurations. Also compatible with models/ratios listed as 21 Cq100 and 19. Key benefits — why you need this part Improved bite and click feedback: the crisp, clear sounder tone makes it easier to hear clutch engagement and bite indications, helping you react faster on the water. Longlasting durability: precisionmachined stainless steel resists corrosion and wear to extend the service life of your reel's sounder mechanism. Directfit replacement: the included base is shaped to match the targeted reel models for straightforward installation and reliable alignment. What makes it stand out Stainlesssteel construction: provides wear resistance compared with nonmetallic parts while maintaining the precise tolerances needed for consistent sound and operation. Optimized base design: ensures stable mounting and consistent contact with the reel's internal components, reducing rattles and inconsistent tones. Tuned sound profile: engineered to produce a crisp, repeatable tone that improves audibility without introducing excess vibration. Compatibility and function Function: restores or upgrades the audible engagement (sounder) function of compatible reels so you can detect spool engagement and fish strikes more reliably. Compatibility: specifically intended for Forzillion Performance TW and Alphas Air TW reel series and Sound Svcompatible setups; also noted as suitable for models/ratios identified as 21 Cq100 and 19. Installation note: recommended to apply a light, appropriate reel lubricant during installation to ensure smooth operation and longterm reliability. Performance and maintenance Consistent sound output: designed to maintain the same tone and pitch over many cycles, aiding repeatable detection in different fishing conditions. Low maintenance: stainlesssteel construction reduces the frequency of part replacement; periodic inspection and light lubrication during routine reel maintenance will keep performance . Typical use scenarios 1) Freshwater casting for bass or trout — install this sounder in a Forzillion Performance TW reel to sharpen bite detection when working soft baits or subtle presentations. 2) Shore or lightboat spinning — a worn sounder on an Alphas Air TW reel to restore clear clutch feedback during long sessions where audible cues matter. 3) Tournament or tournamentpractice use — anglers who depend on immediate, repeatable feedback can use this part to ensure consistent sound performance across multiple reels and gear ratios (including the listed 21 Cq100 and 19 configurations). What to expect when you A precision stainlesssteel sounder and matching base ready for installation on the specified reel families. Clear instructions for fitting; use light lubrication on mating surfaces as recommended to ensure smooth engagement and prevent premature wear. this part if you need a durable, directfit sounder upgrade for Forzillion Performance TW or Alphas Air TW reels, or if you are replacing a worn sounder in setups identified as Sound Svcompatible, including the 21 Cq100 and 19 ratios.