Sound Quality: High-quality Bluetooth speakers are known for delivering clear, balanced, and rich sound. They should provide good bass, midrange, and treble frequencies. Connectivity: Bluetooth speakers should offer reliable and stable Bluetooth connectivity to ensure seamless pairing with devices like smartphones, tablets, or computers. Some may also have additional connectivity options like NFC or AUX input. Battery Life: The battery life of Bluetooth speakers is an essential factor, especially for portable use. Long battery life ensures extended listening sessions without the need for frequent recharging. Build Quality: Durable and well-built construction is crucial for longevity. Quality materials and robust design contribute to the overall durability of the speaker. Portability: If the speaker is designed for on-the-go use, it should be compact and lightweight, with features like a built-in handle or easy portability. Water Resistance: Some Bluetooth speakers come with water-resistant or waterproof features, making them suitable for outdoor use or near water environments. Controls and Features: User-friendly controls, such as easy-to-access volume buttons, play/pause functionality, and possibly voice control, contribute to a positive user experience. Some speakers also come with built-in microphones for hands-free calling. Brand Reputation: Check the reputation of the Sonilex brand and customer reviews for specific models. Positive reviews and a good brand reputation can be indicators of product quality. Compatibility: Ensure that the Bluetooth speaker is compatible with the devices you plan to connect to it.