It is important to note that the provided text and online search results present conflicting information regarding the price and features of the "AirPods 4". While your provided text states a price of BDT 21,490, other sources show different prices for various models, including a standard model and one with Active Noise Cancellation (ANC).

Key Features of the Apple AirPods 4 (according to the provided text):

• Sound Quality: Superior sound with deep bass and clear vocals, thanks to upgraded drivers and the H1 chip.
• Connectivity: Seamless and instant connectivity with Apple devices via the H1 chip.
• Battery Life: Up to 6 hours on a single charge, with an additional 24 hours from the charging case.
• Fit: Comfortable and secure ergonomic design with customizable silicone tips.
• Durability: Sweat and water-resistant.
• Siri Integration: Built-in Siri for hands-free control.

Benefits of Buying from kinabecha (according to the provided text):

• Official Warranty: Every pair comes with an official Apple warranty.
• Best Prices: kinabecha claims to offer competitive prices.
• Free Nationwide Delivery: Free delivery anywhere in Bangladesh.
• Flexible EMI & Exchange: Offers EMI plans and exchange options.
• 100% Authentic: Guarantees genuine products.
• Physical Stores: Multiple locations to see the product in person.
• Premium Service: Dedicated customer service team.
• Apple Care+ Facility: A unique program that claims to offer a replacement with a new iPhone 11 if issues arise within a year.