ReSound Key 398 SP BTE

The Key 398 SP BTE belongs to the ReSound “Key” essential hearing aid family, which is designed for users who need reliable hearing support without premium AI-based features. It provides powerful sound output with basic but stable digital processing, making it suitable for daily communication, home environments, and moderately noisy situations. This model is especially useful for users who want: Maximum loudness (Super Power BTE) Simple and dependable performance Affordable hearing solution ⭐ Key Features Super Power (SP) Behind-the-Ear design Suitable for severe to profound hearing loss 8 channels of sound processing Zinc-air battery (Size 675) Strong amplification for speech clarity DFS Ultra II feedback cancellation (reduces whistling) Noise Tracker II (basic background noise reduction) Directional microphones (focus on speech in front) Wind noise reduction (basic level) Impulse noise control (reduces sudden loud sounds) Telecoil support for loop systems Wireless connectivity (limited/basic depending on version) Durable BTE body for daily use 📊 Technical Specifications Feature Details Model ReSound Key 398 SP BTE Type Super Power BTE Channels 8 Hearing Loss Range 60–120 dB Battery Zinc Air 675 Feedback Control DFS Ultra II Noise Reduction Noise Tracker II Directionality Adaptive / Basic directional mic Connectivity Basic wireless (not full premium streaming) Telecoil Yes 🎧 Sound Performance ✔ Strong amplification for profound hearing loss ✔ Clear speech in quiet and moderate environments ✔ Reduced feedback (whistling control) ✔ Better focus on speech vs background noise ⚠ Limitations: No advanced AI sound processing (like ENZO Q series) Limited smartphone streaming compared to higher models Fewer customization options (8 channels only) 📱 Connectivity & Accessories Depending on clinic configuration, it may support: Telecoil (hearing loop systems) Basic wireless accessories Optional external streaming devices (TV streamer / remote mic systems) 👤 Suitable For Severe to profound hearing loss users Users wanting budget super power hearing aid Elderly patients needing simple controls First-time hearing aid users with high power requirement People prioritizing loudness over smart features