Feature: [Receiver Mode] The B6 Bluetooth Receiver converts traditional speakers into Bluetooth-enabled devices. Once paired, stream music wirelessly from Bluetooth-enabled smartphones, laptops, tablets, and other devices without the need for cables. Supports automatic reconnection. [Transmitter Mode] The B6 Bluetooth Transmitter is designed for devices lacking Bluetooth functionality, such as MP3 players, MP4 players, TVs, and PCs. Connect the transmitter to your device using the included 3.5mm o plug to enable Bluetooth transmission, allowing wireless connection to Bluetooth headsets and speakers. [ANC Noise Reduction & AEC Echo Cancellation] Features noise suppression and echo cancellation technology for clear, high-quality stereo sound. [Strong Compatibility] Works with Android and iOS smartphones and tablets, most Bluetooth-enabled o devices, and stereo systems with a 3.5mm o input. [Low Power Consumption] Built-in 600mAh rechargeable lithium-polymer battery provides up to 8 hours of working time, depending on volume. Enjoy extended wireless performance. Simple to use—no app required. Specification: Model number: B6 Bluetooth version: 5.0 Operating time: > 8 hours Bluetooth range: > 10 meters (open area) Battery: Built-in rechargeable lithium-polymer battery (600mAh) Working time: Up to 8 hours (varies with volume) Charging: Micro USB 5V/0.5A o port: 3.5mm Color: Black Main item dimensions: 9.7 x 5.8 x 1.2 cm / 3.82 x 2.28 x 0.47 in Main item weight: 38g / 1.36 oz Package includes: 1 x 2-in-1 Bluetooth Transmitter & Receiver 1 x 3.5mm o Cable 1 x AV Cable 1 x USB Charging Cable 1 x English User Manual Note: This item is shipped without a retail box. The product will be securely packed for safe delivery.