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Frequency:160Hz-20KHz Metallic Design Bluetooth Clear Vivid Portable Speaker  Bluetooth Handsfree Speaker Bluetooth Mini Apeaker Bluetooth Speaker Stereo MP3 Player Best Stereo Sound Bluetooth Speaker for Phone Aluminium Alloy Material  

Output Power:2.0W Portable Design
Noise Ratio:≥90 db Wireless bluetooth audio transmission
Charging Voltage:5V Many classic colors for choice
Working Voltage:3.7V LINE connection
Speaker:4Ω 3W Hands-free
Total Harmonic Distortion(THD):≤0.1% 1KHz/1.8W Support TF card and MP3 play
Size:8mm*8mm*8mm With FM function
Bluetooth Distance:10M

Products details of Best Outdoor Wireless Bluetooth speaker with USB and battery power supply:
1.Power supplier: lithium battery:3.7-4 .2 V DC:5V ,600MA Li-ion battery 
2.Work current: <30mA (Bluetooth module)
3.Work current: <400mA (power amplifier, Bluetooth ) 
4.Standby current: <3mA
5.Frequency range :2.401-2 .480 GHz (2.4GHz ISM Segment)
6.The receiver sensitivity: <-90dBm, BER <0.1%*SNR: 95dB 
7.Distortion: <0.2%
8.Frequency Response: 20HZ-20kHZ
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Feature of Best Outdoor Wireless Bluetooth speaker with USB and battery power supply:
1.Scope: <10 meters of wireless communication (consistent with the Bluetooth protocol specifications )
2.Transmit power: Class2 less than 4dbm, low radiation.
3.Spread spectrum: Frequency Hopping Spread Spectrum
4.Bluetooth version: compatible with V2.1, V2.0, V1.1 and V1.2 standard.
5.Bluetooth protocol support: A2DP, AVRCP.