Microtechnology provides high-definition, crystal clear sound in this ingenious, lightweight in-ear amplifier. So small that once in place it's nearly invisible, this unit comfortably and discreetly fits inside your ear, ensuring that you never miss another word. And it's rechargeable, so no need for expensive batteries! Also includes an easy-to-use volume control for personal preference. This handy 2-pack contains everything you need to start enjoying easy-hearing again: 2 in-hear hearing devices, 6 silicone tips (2 small, 2 medium, 2 large), adapter, charger cable, brush, case and strap. Initial charge time for batteries is 8hrs. After initial charge, recharge time depends on how depleted the batteries are prior to charging. Batteries are non-replaceable and should last approximately 2-3yrs (500-1000 charging cycles-depending upon use).