【Advanced Bluetooth-compatible 5.3】Featuring the latest Bluetooth-compatible 5.3 technology for stable and efficient wireless connectivity. 【Dual-Mode Functionality】Operates as both a receiver (RX) and transmitter (TX), supporting simultaneous connection of two Bluetooth-compatible devices in each mode. 【One-Touch Bass Boost】Enhance your audio experience with a dedicated BASS button for deeper, richer low frequencies. 【Digital Display】LED display shows battery level for easy monitoring of remaining power. 【Auto-Reconnect & Power-Off】Automatically reconnects to paired devices and powers off after 10 minutes of inactivity to conserve battery. 【Compact Design】Lightweight at just 25g with a small form factor, perfect for in-car use or on-the-go. Specifications: Net weight: 25g Product size: 5.5*4.33*1.3cm Charging voltage: 5V Charging current: 186mA Working current: 20mA Shutdown current: 47uA Charging time: 2 hours Working time: RX13H, TX17H Battery capacity: 240mAh Bluetooth-compatible version: 5.3 Bluetooth-compatible transmission distance: straight line 10M