[ Perfect Match for These Devices ]: Nintendo Switch,Switch Lite, PS4 and PC with Win8 or above system. ROUTE AIR supports Bluetooth speaker and all wireless earphones with Bluetooth 5.0, 4.0, 3.0 or 2.1. It also supports dual connections. So when you play a two-player game, both people can hear the sound. | [ Easy to Use, Just One-Step ]: Set your Bluetooth earphones to pairing status. Then insert ROUTE AIR, hold the pairing button A or B 4 seconds into pairing mode with blinking white LED. Pairing is successful once LED turns to constant white. And do not need to pair again next time. | [ Real-Time Audio Sync with aptX Low Latency ]: GuliKit ROUTE AIR adopts the aptX low latency codec to eliminate that annoying lag you may get and ensure smooth transmission for excellent game feel. You can easily enjoy lossless CD sound quality. | [ 10 Meters Barrier-Free Transmission ]: Advanced ceramic antenna provides up to 10 meters barrier-free transmission without any loss. You can enjoy more space and choose the distance you want. Even if several players watch a video game together, it won't look crowded. | [ Small and Portable Do Not Take up Space ]: The beautiful low-key elegant black with thin shape is about 5 mm. Hiden buttons and small LEDs at the buttom side provides no any visual interference in gaming.