Product Name: Newest Portable Sound Amplifier with Solar Power System, Lithium Battery and Headset Microphone Application: This digital portableamplifier is ideal for teaching, tour guide, assembly, conference room, church, parade, lecture, auction, sales promotion,tour guide and outgoing activities. Feature: - With solar power system to protect our environment and extend our service time. - With Low consumption and high storage lithium battery.- Totally mobility and portability - Delicate and fashionable design - More than12 watts output - Flexible HeadsetMicrophone - Adjustable waist band - Compact and elegant design, durable ABS construction Function: 1. Multifunctional digital amplifier all in one with microphone, amplifier and multimedia speaker 2. Adopt high-tech digital circuit technology and SMT, which have full advantage in keep a perfect vocal and howl-proof ability. 3. Built in Audio-in functions, it’s perfect for anywhere you want to listen music and programs. 4. With low power consumption and lithium battery and solar power system design, which supply power in 20 hours continuously 5. The output power is up to 12W and with clear voice, high penetration, that the sound can cover 400 square meters 6. With high class headset microphone, which is suitable for adorn, high sensitivity and super-cardioid directional design, howling cancelling. Technical Parameters: Maximal Output: 12 W Frequency Output: 70Hz-12kHz Output impedance: 4ΩBattery Charger: DC 5V/500 MA Recharging Time: 4-5 H Battery Working Time: 16-20 H Master Weight: 220 G Operation Voltage: 2.5-5 V Material: ABS Product Dimension: 83mm x 115mm x 35mm Content: Master Amplifier 1PC HeadsetMicrophone 1 pc Lithium Battery 1pc Adapter 1pc Audio Wire 1 pc Portable Bag 1 pc Manual 1 pc Warranty Card 1 pc Certification 1 pc Attention: When the machine is without enough power, pls. charge the battery in time. If you don’t use for a long time, it is better for u to charge the battery once a month. Pls. don’t input the outside sound signal(such DVD, CD, MP3) from the MIC IN plug but from AUX IN plug and lower the sound volume firstly, avoid whistle. In order to get perfect sound quality, pls. direct to speak at the microphone cartridge, and avoid the microphone cartridge direct to the loudspeaker. Pls. store the amplifier in the dry circumstance to expand the product life span. Non-specialist, pls. don’t open the machine to repair. Any problem, pls. contact the local distributor directly. In order to keep the product in best performance , pls. use our matched charger We have right to improve or modify the instruction content, and won’t notify you in advance! Thank you