Specification bluetooth Version V5 4Working Frequency Band 2 402GHz 2 480GHzPower Level Power Level 2 Class II Sound Delay 20msPower Supply Mode Built in Battery 250mAhCharging Interface USB DC 5V Type CApplicable Distance 15M no obstruction Working Current 20mAWorking Hours 10HOperating Environment 10°C to 50°CAudio Input Method 3 5MM Audio InterfaceUSB Type C InterfaceFeatures 1 Advanced bluetooth Technology Utilizing the new bluetooth 5 4 standard for low power wireless communication ensures efficient and reliable connectivity 2 High Quality Audio Equipped with the cutting edge LC3 audio decoder it offers impressive sound quality with lower power consumption and minimal delay 3 Auracast Broadcast Mode Capable of linking more than 50 receivers with a single transmitter perfect for sharing audio and connecting with multiple devices 4 Ease of Use Automatic connection upon startup with support for volume adjustments on both the transmitter and receiver ends Versatile audio input options with AUX or USB Type C 5 Extended Battery Life Built in batteries offering up to 12 hours of usage ideal for a variety of settings and prolonged use Package Include 1x Transmitter1x Receiver1x Manual