Features: Brand new and high quality A high performance wireless microphone for voice amplifier. More natural and clear voice, just as original voice. Widely apply for teaching, guide, sales, speech, conference, meeting, karaoke, etc. The big LCD displays the frequency and volume. Built-in rechargeable lithium-ion battery can used for up to 10hours after being fully charge, and it is very environmentally friendly for long-term use. Specifications: Material:ABS Battery: 250mAh Charging voltage: DC5V 1000mA Maximum output power: 1MW Working hours: 8-12 hours Charging time: < 4 hours Size: Approx.116x86.6x40.7mm/4.56x3.4x1.6inches Frequency response: 87MHz-108MHz Package Includes: 1x Wireless Microphone note: 1.Please note when purchasing: This is an FM wireless microphone that needs to be used with FM radio function amplifier, amplifier, etc., and cannot be amplifies independently. As long as there is FM radio function, switches to FM radio function after booting to the same frequency point can wireless amplification. 2.Indicate: this FM high-fidelity wireless microphone has no speaker. 3.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 4.Due to the difference between different monitors, the picture may not reflect the actual color of the item.