BR17 Bass Boost 2 In 1 Digital Display Bluetooth-Compatible Receiver Transmitter Audio Adapter 1.Advanced Bluetooth-compatible 5.3:Featuring the latest Bluetooth-compatible 5.3 technology for stable and efficient wireless connectivity. 2.Dual-Mode Functionality:Operates as both a receiver (RX) and transmitter (TX), supporting simultaneous connection of two Bluetooth-compatible devices in each mode. 3.One-Touch Bass Boost:Enhance your audio experience with a dedicated BASS button for deeper, richer low frequencies. 4.Digital Display:LED display shows battery level for easy monitoring of remaining power. 5.Auto-Reconnect & Power-Off:Automatically reconnects to paired devices and powers off after 10 minutes of inactivity to conserve battery. 6.Compact Design:Lightweight at just 25g with a small form factor, perfect for in-car use or on-the-go. Specifications: 1. Net weight: 25g 2. Product size: 5.5x4.33x1.3cm 3. Charging voltage: 5V 4. Charging current: 186mA 5. Working current: 20mA 6. Shutdown current: 47uA 7. Charging time: 2 hours 8. Working time: RX13H, TX17H 9. Battery capacity: 240mAh 10. Bluetooth-compatible version: 5.3 11. Bluetooth-compatible transmission distance: straight line 10M