Features: Full-scenario compatibility: double 3.5mm plug adapter for double aircraft compatibility; Transmitter features wide voltages compatibility with aircraft, treadmills and older televisions, catering to both travel and daily use. Highly Definition auditory Transmission: Four-wire channel separation in the adapter ensures lossless stereo sound; Transmitter features bluetooth-compatible 5.0 + with under 40ms latency, eliminating auditory-visual desynchronisation during viewing. double Device Connectivity: Transmitter pairs with two bluetooth-compatible headphones simultaneously for shared media; select models offer receiving/transmitting double-mode switching via button for cabin/vehicle use. Specifications: Component: ABS+brass Color: black\ white Optional Weight: 50g Size: 2.5x2x3.2cm/0.98x0.79x1.26in Package Includes: 1PC Headphone auditory converter note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.