Promate (RippleGlow) Bluetooth Wireless Earphones - Built in LED Bar - Silicone Neckband - Black

Promate (RippleGlow) Bluetooth Wireless Earphones - Built in LED Bar - Silicone Neckband - Black- Bluetooth Version: 5.4- Input Rating: DC 5V,1A- Speaker Diameter: 16mm- Frequency Range: 20Hz-20kHz- Sensitivity: 126dB±3dB- Impedance: 20Ohms- SNR: more than 62dB- Charging Time: 1.5h- Playing Time: 18h- Standby Time: Up to 180 hours- Battery Capacity: 230mAh- Battery Type: Li-Polymer- LED Brightness: 5000mcd- LED Modes: 2 (breathe, steady on, off)