SpecificationsBluetooth Version: V4.0+EDRSupported Profiles: A2DP,AVRCPBluetooth Range: Within 33ft (10m)Dimensions: 112.7*57.5*22.5mmBattery: Rechargeable Lithium-ion battery 300 mAhCharging Time: 5V About 2 hoursWorking Time: Up to 6 hoursStand-by Time: Up to 300 hoursTransmitter ModelMake sure the switch under TX mode.Use the audio cable connect this product to the TV or others devices.Open your Bluetooth headsets or speakers (under Bluetooth model).This product will auto-connect your Bluetooth headsets or speakers, then the TV or others devices sound will transmitter into your Bluetooth headsets or speakers after pairing successful. Note:The transmitter searching time will last about 20 seconds, if your devices not be paired successful after 20 seconds, please press the reset button to try again. Receiver ModelMake sure the switch under RX model.Use the audio cable connect this product to the normal speaker.Use cellphone to search and connect.One with two: close first cellphone Bluetooth, then use second cellphone connect the receiver like previously, at the same time you can open the previous cellphone to connect this receiver. Note:The receiver pairing time will last about 2 minutes, if your cellphones no pairing successful after 2 minutes, please press the reset button to try again.LED Status Pairing: Blue LED flashingPaired Successful: Blue LED solidPower Low: Red LED flashingCharging: Red LED solidFull Charged: Red LED turn offIncluded:2 in 1 transmitter & receiverUSB Micro Charging Cable3.5mm Audio CableUser Manual