Sound of Science TECHNICAL SPECS FOR SQUARES HEADPHONE Ear coupling: Var-ear Frequency response (headphones): 16 Hz 22000 Hz Bluetooth: Bluetooth 4.
ANC transducers: 30mm dedicated ANC drivers Battery specification: Rechargeable Lithium-ion Polymer (Marathon) Battery life: up to 24 hours with Bluetooth only or 8 hours with Bluetooth, ANC and Amp Microphone pick-up pattern: omnibus-directional