Blue Tooth Hand Free Kit brief Instruction: When you driving the Vihicle,you are no need hold your Mobil,no need connect Mobile wire that just you may heartily talk freely .Because it is fully Hands Free communicating by phone,Let you release your two heads for absorbedly driving,It is safety as well as not violate traffic regulations. It also can avoid electromagnetic radiation of the Mobile same time. It apply for all Blue Tooth Mobile,no need to install,immediately buy it and use at once. Pronunciation is clear and loud, It's communicating effect is good same by hand holding. 1. DSP both communicating simultaneously by HANDSET whenever;Restrain the circuit of tremble and noise;no noise and echo. 2. BLUE TOOTH specification:1.2(0 to 10m between handset and this Device);Within two Microphone and Loundspeaker;Maximum Volume is 120 db. 3. Incoming call indicates on the LCD;Pronunciation dial;Redial NO. finally. 4. Possess 20-60 Seconds Record Function. 5. Apply all handsets of Blue Tooth function. 6. Power:3A dry BATTERY,or outside connect 4.5V simultaneously. 7. Incoming call indicates Function. 8. It is Deft indepentent wireless Earphone( make sure your secrets) 9. It can adjust Frequency that will put sound lead into acoustics while emitting sound out . (Tone quality as talking worksite)