E126W Portable Wireless Amplifier Feature Compact, lightweight, wireless voice amplifier. UHF transmission, effective up to 40m in open area. 8W high-power digital audio amplification, with wireless headset mic. Built-in Li-ion battery lasts up to 8h, supports Type-C quick charge. Wireless audio playback for untethered music enjoyment. LED indicators give you a clear idea about device status. Wear across shoulder or around waist, use at ease. Stylish look and ergonomic design. Specification Voice Amplifier Frequency Response: 80Hz-12kHz Peak Power: 8W Speaker Impedance: 4 THD: THD1% Operating Voltage: 3.5V-4.2V Battery Type: Lithium-ion battery Battery Capacity: 3.7V/2,000mAh Charging Method: DC 5V/800mA Charging Time: approx. 2.5h Battery Life: approx. 8h Net Weight: approx. 142g Dimensions: 91mm*41mm*119mm Headset Micropho Cartridge: back electret Polar Pattern: unidirectional Frequency Response: 60Hz-16KHz Sensitivity: -51~-54dB UHF Frequency: 630MHz-698MHz (segmented) UHF Effective Range: approx. 40m, open area Battery Type: Lithium-ion battery Battery Capacity: 3.7V/400mAh Charging Method: DC 5V/150mA Charging Time: approx. 2.5h Battery Life: approx. 5h Net Weight: approx. 39g Note: The above data is measured by Takstar laboratory, and Takstar has the final interpretation right