Feature: 1. UPGRADE: It can be used to upgrade old sound equipment, such as old stereos, amplifiers, music players, to realize wireless Bluetooth connection and enjoy Hi Fi sound quality. 2. MULTI DEVICE CONNECTIVITY: Connect two devices simultaneously for seamless music sharing. Enjoy the convenience and play your favorite sounds at will. 3. EXTENDED BATTERY LIFE: Featuring a built in 200mAh li battery, this receiver boasts a remarkable playback time of 6 to 8 hours. Stay immersed in your music without the worry of frequent recharging. 4. LOSSLESS SOUND PLAYBACK: Supports multiple music formats for lossless playback, catering to diverse sound preferences. Experience rich and vibrant sound that meets the needs of every listener. 5. ADVANCED REMOTE CONTROL TECHNOLOGY: Equipped with infrared remote control, this device allows for effortless operating from a distance of 10 to 15 meters, enhancing convenience. Specification: Item Type: NFC Receiver Material: ABS Bluetooth Version: Bluetooth 5.0 Transmission Distance: 15m / 49.2ft Battery Type: Li Battery Battery Capacity: 200mAh (Built in) Frequency Response Range: 10Hz - 20KHz Signal to Noise Ratio: > 110dB Music Formats: MP3, APE, FLAC, WAV, WMA Remote Control Battery: One CR2025 Coin Cell Battery Battery Capacity: 240mAh (Built in). Package List: 1 x Receiver1 x Remote Control1 x Instruction Manual1 x 3.5MM to 3.5MM Sound Cable1 x Sound Cable1 x Charging Cable