Brand - Ugreen, Model - Ugreen 30445 Wireless Bluetooth Audio Receiver, Type - Wireless Bluetooth Audio Receiver with 3.5mm and 2RCA Adapter, Use For - Tablet or Smartphone Wirelessly to Headphones, Home Theater, or Speaker, Features - Wireless Bluetooth Audio Receiver 4.1 with 3.5mm and 2RCA Adapter, Color - Black, Warranty - 1 year, Others - Bluetooth Version: 4.1, Output: Female R/L audio and 3.5mm audio, Frequency Response: 20Hz-22kHz, Output Power: 25mW, SNR: 100dB RL=16??, Operating time: up to 8 hours and Micro USB for power supply (5V), Transmit Range: Up to 10m, Approximate charging time: 2 hours, Dimension: L 66.6 x W 66.6 x H 24mm, Part No - 30445, Country of Origin - China, Made in/ Assemble - China