Specification: Bluetooth v1.2 compliant
Bluetooth Profile Supported:
A2DP (Advanced Audio Distribution Profile)
AVRCP (Audio Video Remote Control Profile)
Fixed PIN Code: 0000 (a sequence of four zeros)
Connection: Point-to-Point
Audio Codec: SBC

Carrier Frequency: 2.4 - 2.483 GHz
Spread Spectrum: FHSS (Frequency Hopping Spread Spectrum)
Modulation Method: GFSK (Gaussian Frequency Shift Keying)
Radio Coverage: Class 2, up to 3–10 m (9–30 ft) in open field (The actual range depends on the paired Bluetooth device, battery power, and environmental factors: orientation of devices relative to each other, obstructions, enclosures, radio frequency noise, and interference.)
Antenna: Ceramic Antenna
Sensitivity: < 0.1% BER @ -80 dBm
RF Output Power: -6 to 4 dBm

Power Consumption: 190 mW
Power Input: 5 V / 200 mA (Use only the original USB power cable included in the BT450Tx & BT450Rx-C retail package to charge the BT450Tx stereo transmitter.)
Built-in Battery: 3.7 V / 300 mAh / Li-Polymer / Rechargeable

Operating Time: approx. 7 hours(The actual operating time depends on the usage frequency and environmental factors. The long distance wireless connection will increase the power consumption.)
Operating Temperature: -10°C ~ +60°C
Storage Temperature:-20°C ~ +70°C