1. LE AUDIO - AK818 is one of the few transmitting and receiving devices in the world that supports LE AUDIO, balancing the characteristics of low latency of 20mm and sound quality of 24b/96kHz. So it is suitable for use in low latency scenarios such as listening to music or gaming. Support for S24 phone LE Audio Auracast, Also support ULL mode. 2. AURACAST/Broadcast mode - AK818 supports the LE AUDIO standard specification AURACAST feature by default, supporting 1 transmitter and N receivers, and can expand the straight-line distance to 20 meters, surpassing traditional 2.4G wireless technology in overall performance. 3. Multi mode input/wide compatibility - The AK818 transmitter supports AUX in mode music input and USB C mode music input. So it is almost used on all devices, metaphorically referring to game consoles, computers, Android phones, laptops, etc. 4. Upgrading old devices - The AK818 receiver supports Aux interface, which can turn your wired headphones or speakers into devices that support LE AUDIO without replacing old products and experiencing the power of new technology without incurring significant costs. 5. Very Easy to Use - Automatic connection upon startup, with support for volume increase and decrease at both the transmitter and receiver ends. The transmitter can also support audio input of AUX or USB C, accompanied by LED lights. Extra Long Working Hours - Bluetooth 5.4, ultra-low power consumption The transmitter and receiver have built-in batteries, which can be used for 12 hours and fully meet your occasions. 6. Main parameters of the transmitter: Bluetooth version:V5.4; Working frequency range:2.402GHz -2.480GHz; Power level:Power level 2 (Class II); Sound delay Less than 20ms; Power supply:method with built-in battery, 250mAh; Char interface:USB DC 5V type-c charging interface; Applicable distance 15M (without obstruction); Working current Less than 20mA; Working hours 10H; Operating environment (-10-50); Audio input method: 1) 3.5MM audio interface 2) USB type-c interface; Suitable for devices with 3.5MM audio output and USB audio output functions, such as TV, PC, MP3, CD, and other devices. 7. Main parameters of the receiver end: Bluetooth version:V5.4; Working frequency range:2.402GHz -2.480GHz; Power level:Power level 2 (Class II); Sound delay Less than 20ms; Power supply:method with built-in battery, 150mAh; Charging interface:USB DC 5V type-c charging interface; Applicable distance 15M (barrier free); Working current Less than 15mA; Working hours 10H; Operating environment (-10-50); Suitable for audio and other audio devices with AUX input interfaces; Audio output mode:3.5MM audio interface; Colour:Black; Material:Plastic; Package Contents:1 * Bluetooth Transmitter; 1 * Bluetooth Receiver; Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.