タイトルまたは説明

S**5 ultra light wireless portable voice amplifier
Voice Amplifier
Tour Guide Voice Amplifier,Teaching Portable Voice Amplifier,Waistband Voice Amplifier

Item No.: S**5
Ideal for teachers, presenters, tour guides, sports instructors. Also, as a voice amplifier for Parkinsons disease and larynx disorder patients.
Output power: *0W
2. Charging Voltage: DC 5V, **0mA
3. Battery: 3.7V, ***0mAh
4. Working time: with *0% volume
*0~*5hours (MIC mode)
5. Charging time: **5 hours
6. Product size: *2**5**0mm
7. Unit weight: **1g
8. Available color: blue; black; red
9. Working temperature: **0℃~*5℃
*0. Frequency response: *0Hz~*8KHz
*1. Sound coverage: **0㎡
More information you you can view here
Shidu product has got lots of praise since it came to sell, it was rated as leading firm by 

educational circles in China, with the ability of two millions products per year Shidu is the 

largest manufacturer of voice amplifier in China, it has got numbers of technical patent, 

and promote many criterion of this industry. Shidu takes Innovation changes future as 

a concept, takes Quality, Value,Perfect,Dream as a core values to supply worthy 

products and services for the customers.