【NO LIP SYNC DELAY & CODEC INDICATORS】Ultra-Fast with apt-X Low Latency, the audio delay of this Bluetooth V4.2 headphones for TV/PC video gaming is an imperceptible 32-40ms. Enjoy superb lag-free audio experience now. Unique Codec Indicators show you which codec is active after pairing, while for most wireless Bluetooth headphones, customers usually don't know which codec is on. NOTE: You will need one ADDITIONAL Bluetooth transmitter if your TV does not support Bluetooth. 【BLUETOOTH 4.2 & SUPERIOR HIFI SOUND】AUSDOM wireless headphones support Bluetooth 4.2, with faster and more reliable CSR 64215 chipset. 40mm driver and noise isolating mic allow you to enjoy gorgeous rich sound. Built-in bass boost brings audio with crisp treble, powerful bass and clear mid tones to your Bluetooth headphones. Perfect music headphones for audio lovers and those who are into hip hop, rock or electric. 【DUAL MODE & LONG BATTERY LIFE】The wireless headset can be converted to a wired headphones without battery consumption in seconds by using the included 3.5mm cable. 400mAh rechargeable battery for long working time. Supports IOS battery indicator: displays the battery level of the earphone on your iPhone.