Features 1、USB INTERFACE: Equipped with MICRO MINI USB 5P interface, which can be powered by phone data cable, support for Android and for iOS. 2、STEREO OUTPUT: Dual channel stereo output, compatible with most power amplifiers, home audio, car audio and other equipments. 3、MULTIPLE FUNCTION: The Bluetooth audio module supports inserting USB flash disk, memory card and key settings, and can play MP3. 4、DISTANCE RANGE: The communication distance of the module is 3‑12 meters (depending on the environmental ), meets more control needs. 5、GOOD PERFORMANCE: Includes 2pcs Bluetooth audio modules, with standard pins to ensure stable signal and good contact performance. Specification Item Type: Bluetooth Audio Module Power Supply Interface: MICRO USB Port or 2.54 Million Pins Bluetooth Name: BM3 Bluetooth Password: 1688 (connection requires a password and cannot be changed) Communication Distance: Approx. 3-12 meter / 9.8-39.4ft (depending on environmental barriers) Support Bluetooth Version: Bluetooth 4.1 or below Support Mobile Phone System: For Android, for iOS Channel: 2 Channels Sound Quality: MP3 lossless decoding Independent Power Amplifier: None External Power Amplifier: Unlimited external power amplifier PCB Thickness: 1.6mm Needle Pitch: 2.54 Million Package List 2 x Module 2 x Accessories