Features 1. Reception mode: The Bluetooth receiver converts traditional speakers into speakers that support Bluetooth. After pairing, you can play music wirelessly through smartphones, laptops, tablets, and other devices that support Bluetooth without the need for cables. Supports automatic reconnection. 2. transmitter mode: Bluetooth transmitters are designed specifically for audio devices without Bluetooth functionality (such as MP3, MP4, TV, PC, etc.). You can connect Bluetooth transmitters to audio devices through the included 3.5mm audio plug, change these audio devices to Bluetooth audio devices, and use them with Bluetooth headphones and speakers. 3. ANC noise reduction&AEC echo cancellation: Supports noise suppression and echo cancellation, providing you with gorgeous stereo sound and wonderful sound quality. 4. Strong compatibility: Compatible with Android and iOS smartphones and PADs, almost all Bluetooth supported audio devices, and stereo systems with 3.5mm ports. 5. Low power consumption: The battery ensures a working time of up to 8 hours, allowing you to enjoy wireless freedom all day. Easy to use, no need to download any apps. Specification Supported protocols: A2DP, AVRCP, HFP, SPP HID Receiving working current: 43MA Emission working current: 60MA Standby current: 18MA Built in battery: polymer battery Charging current: 300MA Battery life:>8H Bluetooth distance:>10M (in open areas) Charging method: Micro USB 5V/0.5A Output connection method: 3.5MM stereo interface Input connection method: 3.5MM stereo interface Compatibility: Android, iOS system phones and PADs, as well as all Bluetooth audio devices, audio devices with audio input interfaces Host size: 9.8 x 5.8 x 1.3 cm Host weight: 40g Packaging size: 13 x 7 x 3.5 cm Full set weight: 107g Package Include: 1x Host 1x 3.5MM audio cable 1x RCA line 1x USB power cord 1x English instruction manual