The Phonak Bolero Q P Q50 has disposable batteries, telecoil, push button, volume control, directionality, and adjustment synchronization. The easy-to-use, durable choice for active clients Phonak Bolero Q hearing aids are available in a range of fresh colors and styles. Based on feedback from clients and hearing care professionals, a water- and dust-resistant model is available for added confidence in active situations. Best in class listening experience Based on the innovative Binaural VoiceStream Technology™, Bolero Q hearing aids provide audibility in a broad range of listening environments. Unique features allow clients to engage in conversation wherever they choose, while eliminating unwanted sounds.