Feature: 1. RECEIVER MODE: The Bluetooth receiver changes conventional speakers to Bluetooth enabled speakers. After pairing, you can play music wirelessly from Bluetooth enabled smartphones, laptops, tablets, etc. without the hassle of cables. Supports automatic reconnection. 2. TRANSMITTER MODE: The Bluetooth transmitter is specially designed for sound devices without Bluetooth function (such as MP3, MP4, TV, etc.). You can connect the Bluetooth transmitter to sound devices via the included 3.5mm sound plug to change these sound devices to Bluetooth enabled sound devices and make them work with Bluetooth enabled headphones and speakers. 3. ANC NOISE REDUCTION AND AEC TECHNOLOGY: Supports noise suppression and AEC cancellation, providing you with wonderful stereo sound and great sound quality. 4. STRONG COMPATIBILITY: Compatible with for Android and for iOS smartphones and tablets, almost all Bluetooth enabled sound devices, and stereo systems with 3.5mm ports. 5. LOW POWER CONSUMPTION: Built in 600mAh battery ensures up to 8 hours of working time, you can enjoy wireless internet all day long. Easy to use, no need to download any APP. Specification: Item Type: Bluetooth 5.0 Transmitter Receiver Material: ABS Support Protocol: A2DP, AVRCP Built in Lithium Polymer Battery: 600mAh Output Connection: 3.5MM Stereo Connector Input Connection: 3.5MM Stereo Connector Compatible With: for Android, for iOS System Cell Phones and Tablets, and All Bluetooth Sound Devices, Speaker Devices with Sound Input Interface. Package List: 1 x Bluetooth Transmitter Receiver1 x Sound Cable1 x Cord1 x Instruction Manual1 x USB Cable