Quartet-Extra - Add-On Headphones for Quartet System | Add-on 2.4 GHz RF headphones for the Quartet group listening system, scalable for up to 100 listeners

[ONLY WORKS WITH QUARTET] This single pair of 2.4G wireless headphones serves as an add-on for the Quartet bundle (sold separately). Add up to 100 of these headphones to the Quartet bundle and experience an outdoor movie or silent concert without disturbing the neighbors. [LESS DELAYS, BETTER QUALITY] The Quartet-Extra headphones utilize 2.4G technology, not Bluetooth. This cuts audio lag to ~30ms significantly less than the 220ms of standard Bluetooth and even the 40ms of aptX Low Latency. This also enhances overall sound quality thanks to 2.4G 's higher bit rate and extended bandwidth.

[INDIVIDUAL VOLUME CONTROL] Each pair of wireless headphones comes with built-in individual volume controls, allowing everyone to listen at their preferred volume. [LIGHTWEIGHT & COMFORTABLE] These headphones are ergonomically crafted to be lightweight and flexible, with soft memory foam earpads and an adjustable headband. Enjoy all-day, pressure-free use.
NOTE: Replacement earpads are available for purchase. [EXTENDED PLAYTIME] With up to 20 hours of battery runtime, these headphones will endure your longest movie or concert sessions with time to spare