For sale: Used Sennheiser HD 4.50BTNC headphones (excellent noise isolation and clear sound). Ad Details: Brand and Model: Sennheiser HD 4.50BTNC. Condition: Used (in excellent, very clean condition, all buttons and features work 100% efficiently). Key Specifications: Active Noise Cancellation (Noise Cancellation): Excellent NoiseGuard isolation for airports, offices, or travel. Sound Quality: Clear, balanced sound with deep, distinctive bass, as is typical of Sennheiser. Connectivity: Supports wireless Bluetooth and one-touch pairing via NFC technology, as well as wired operation (AUX). Supports iPhone and Android. Battery: Lasts up to 19 hours with noise cancellation on, and up to 25 hours without it. Design: Very comfortable for the ears and foldable for easy portability. Accessories: (Original case, original box, manual). Price and Contact: Asking Price: [400] SAR (non-negotiable). New price on Amazon is 990 SAR and on Trendyol is 1155 SAR.