FeaturesMulti-function Bluetooth transmitter&receiverIn TX Mode: Transfer your music from a TV, CD player, for Ipod, laptop to a Bluetooth headset or stereo (You can connect two devices at the same time); In RX Mode: will transfer the music in your mobile phone or to the audio, so that you can enjoy HIFI CD freely The sound quality. Bypass mode: cable connection between TV and Speaker, you no longer need to plug/unplug any wires,easily switch it to other two mode.262FT for Ultra Long Range Utilizing the latest Bluetooth 5.0 technology and dual antennas design, Our Bluetooth / receiver can achieve a range of up to 262ft(80m) line-of-sight in open air and up to 80-110ft(25-35m) indoors, which ensures a stable connection without losing signal wherever you go in your big house. *NOTE: Operation range can be affected by Wi-Fi routers, wireless TV adapters and also depends on the receiving devices.The Listening Experience Support low latency, virtually eliminating visual and auditory delays, you can simultaneously steam audio to 2 Bluetooth headsets, making VIKEFON BT-B15 bluetooth headphones become the best choice for watching TV and movies. Note: In order to achieve this low latency, your receiving setup must support low latency.USB Rechargeable It has for built-in 500mAh battery, this is a UNIQUE feature compared to similar products, you can use it in any situations even there is no for AC outlets. It can be fully charged in 2.5 hours but allows for more than 8 hours in TX mode & 10 hours in RX mode of solid use, which is for ideal for listening all day or on a long road trip, also you can use it while charging. *Note: This product will automatically enter the dormant and power-saving mode after 6 minutes without connection.Easy Set Up, Easy Use Supports remember your setting after power failure. Supports / 2 RCA audio output standards making it compatible with 99% of the on the market(NOTED:Don&39;t support Digital OPTICAL),If you need support Digital OPTICAL,please select our BT-B21 or BT-B22 etc.Setup is a snap simply connect your transmitter/receiver to an outlet and your audio system, pair it to a phone or tablet and enjoy the music.Specification:Type:Bluetooth 5.0 Audio AdapterColor:BlackMaterial:ABSPCSize:11*9*2.5cmBluetooth chip: CSR ChipBluetooth version: V5.0Bluetooth protocol support: RX:A2DP AVRCP TX: A2DPTransmission distance: >80M (Open Area)Battery standard: 500MAWorking time: RX>10H ;TX>8HCharging time: about 2.5HCharging voltage: DC 5VAudio output mode: RCA, 3.5MM stereo audio interfaceCODEC: TX: Aptx LL,APTX,SBC,FS; RX: Aptx LL,Aptx,SBC,AAC,FS.Note:- There might be little error of size for manual measurement.- Due to different lighting effect and setting, actual item&39;s color may not exactly reflect color on pictures.