Specification
Real Manufacturer Website details: 
1: http://www.dingsung.com.cn/product_show.php?id=14&tid=4

Working temperature -40?~+80?
Storage temperature -60?~+80?
anti-electromagnetic interference: 10V/m 0.1-1000MHz AM electromagnetic wave
Voltage +3.0V ~3.6VDC
communication type:  TTL232
 Baud rate : 9600
reliability: MTBF=70000 hours
working life 15years
Modulation: GFSK
Working frequency 2.4 - 2.45 GHz
receive sensitivity =-93dBm
antenna polarization: perpendicular