Features Type: In-Ear Wireless: True Wireless Connection Type: Bluetooth Water Resistant/Saving: IPX4 Active Noise Cancellation: Yes (active noise reduction technology Bose) Description Amazon's Echo Buds offer a mix of functionality, including hands-free Alexa voice control, active noise reduction optimized by Bose and remarkable comfort. Simple Auricular design, with black plastic shells without visible Amazon marking. Three pairs of silicone ear tips and three pairs of fins to fit the ear. IPX4, sweat resistant but not washable. Tactile control Touch sensitive back panels for four input gestures. Possibility of programming gestures through the Alexa app. Battery battery Battery life up to five hours with a single charge. The included charging case offers three complete charges. Compact charging housing with battery level indicator. Functionality Alexa Hand-free access to Alexa for a wide range of voice commands. Support for many features offered by Echo devices. Reduction of the Bose Noise Reduction Technology which significantly reduces external noise, although not at the total noise level. Musical performance Balanced audio response, with robust bass but not always defined in the lowest frequencies. Good performance of musical tracks with adequate details, although they may lack sharpness or depth in extreme frequencies.