Automatic Bluetooth speaker module type:
1, use:
Red Line Power Supply: DC3-6.5V, directly refuting the back of receiving the speaker on the power switch.
Black wire to ground, directly refuting the ground receiving the speaker.
L, R then left and right channels. Direct Access received a speaker on the left and right channel input.
2, open the speaker power, with a Bluetooth mobile phone or PC, to find, enter the password: 0000 or 8888,
3, select the link to confirm.
4, mobile phone or PC to play music, it was ok.
5, if not connected to a Bluetooth mobile phone or PC, etc., will enter the automatic standby.
6, if the need to re-enable the Bluetooth function, re-operation time :2-4 on ok.

Automatic type Bluetooth Speaker Module Description:
Brand: OEM / Ktlink
High-quality stereo music,
Pure and perfect sound quality; treble thin clear, dynamic bass-rich.
Light weight, long life, small size, and environmental protection.
Safe, low radiation.
Bluetooth Speaker for wide population, students listen to music, learning English; white-collar workers as leisure products, stylish and convenient.
Light and compact, home, travel, outdoor enjoy the music anywhere can be anywhere.
Can be used as wireless speakers use a variety of media for connecting PC, laptop, mobile phones and other sources.

Features:
Support A2DP mobile phone and PC music, high-quality stereo music, pure sound quality.
Compatible with many major brand Bluetooth cell phone use.

Specifications:
Size: built-in antenna 56.5x18.5x4.5mm,
Spread Spectrum: Frequency Hopping Spread Spectrum (FHSS)
Working range: 10 meters of wireless communication

Technical Specifications:
Chipset: CSR Bluetooth chip
Operating Voltage: 1.8V
Operating Current: <100MA (stereo)
Standby current: <1MA
Working range: 10 meters of wireless communication, measured up to 18 meters
Transmission power: Class2 less than 4dbm, low radiation.
Spread Spectrum: Frequency Hopping Spread Spectrum (FHSS)
Bluetooth version: compatible with V2.1, V2.0, V1.1 and V1.2 standards.
Bluetooth protocol: A2DP, AVRCP
Frequency range :2.401-2 .480 GHz (2.4GHz ISM Section)
Receiver sensitivity: <-82dBm, BER <0.1%
Microphone Sensitivity: [-45dB (0dB = 1V/Pa, 1KHz)]
Left and right channel separation:> 49dB
SNR:> 80dB
Dynamic Range:> 85dB
Distortion: <0.2%
Frequency response: 80-18000HZ
Operating temperature: -10 ℃ ~ 55 ℃
Support and IEEE 802.11 coexistence
Meet the ROHS standard
Meet FCC, CE, BQB certification