The datasheet for the bluetooth module that is onboard the bluetooth shield has some information pertaining to exactly what you have described above…
2．Feature
Radio Transceiver
Typical –80dBm sensitivity
Up to +4dBm RF transmit power with power level control
Fully Qualified Bluetooth V2.0+EDR(Enhanced Data Rate) 2Mbps Modulation
Integrated 15-bit Linear 8KHz Sample Frequency Audio CODEC in one chip
Internal 6Mbit ROM
Low Power 1.8V Operation
Integrated Switch-Mode Regulator (DC To DC)
Integrated Battery Charger With Programmable Current
PIO control
Standard HCI(UART or USB)
4.2V Tolerant LED Drivers With Intensity Control
UART interface with programmable baud rate
Basic module without antenna
Basic module as SMD type
With Audio Out & Audio in
Package option
Edge connector
- Summary of Benefit
Complete Bluetooth Solution
Complete 2.4GHz radio transceiver and baseband
CSR Bluecore 04-Audio ROM, single chip bluetooth system with CMOS technology
Adaptive frequency hopping feature (AFH)
Smallest footprint, 27mmX13mm
Simplify overall design/development cycle
Full speed Class 2 bluetooth operation
Class I support using external power amplifier
Low power standby modes to enable high efficient power management
High performance radio transceiverz Low overall system cost
Application
Mouse
Automotive Hands-Free Kits
Cordless headsets
Software
Support CSR bluetooth stack
Design for Client
You can view more at the following link
seeedstudio.com/wiki/images/ … module.pdf