Mini Rechargeable Noise-Cancelling Digital Sound Amplifier Earbuds for TV with Portable Charging Case — Pair (Black) — for Adults & Elderly

Compact, rechargeable digital sound amplifiers designed for TV listening and everyday use by adults and seniors. These mini earbuds feature active noise-cancelling and come with a portable charging case for on-the-go power. Power and runtime: Amplifier battery: 45 mah; Rechargeable case battery: 400 mah; Charging time of amplifier: 2 hours; Amplifier working time : 45 hours. The charging box charges the amplifier for 3~4 times. Weights: Amplifier weight : 3.9 g / 0.14 oz; Charge case weight : 34 g / 1.19 oz. Acoustic and electrical specifications: Maximum Output: 115 dBSPL; Average Output: 1064 dBSPL; Peak Gain : 333 dB; Average Gain : 303 dB; Frequency Range: 500 Hz~4000 Hz. Distortion (THD): 500 Hz ： 0.9%; 800 Hz ： 0.6%; 1600 Hz ： 0.4%. Equivalent Input Noise 12 dB. Operating Power Supply 1 mA. Rated Working Voltage of Amplifier: 3.7 V. Package contents: 2 Amplifiers; 1 Charging Case; 1 USB Cable; 8 Silicone Ear Domes; 10 Dust proof Nets; 1 Cleaning Brush; 1 Instruction manual; 1 Operation Guide.