Established on August 31, 2002, our company specializes in the professional development and production of electronic audio goods. Our main products are hi - fi stereo headphones, earplugs (include earplugs with FM function), hands-free products, ultra-thin speakers, and multimedia sound box speakers, which are widely applied in CD players, MP3&MP4 players, computers, mobile phones, sound boxes and interphones. We have been working hard and developing continuously new products to make Dalisong an excellent brand. We will bring in the latest equipment and technology of the field to develop higher-level products. Our ten-year goal is to make Dalisong achieve 30% market share in China. We take this as our drive, and well do with every product and everything today. We are striving for "lower cost, better quality, lower price and better service". Our eternal service tenet: Credit oriented and quality first Our company guideline:to make more profit for customers and the society with the lowest cost Our team slogan: hard-working, united and ambitious. "Dalisong earphone performs the melody of your heart."We hope that Dalisong can bring the world and the people more beautiful melody and create more sweetness and happiness.

Description:
1.Sensitivity at 1KHz : 105+/-3 dB;
2.Impedance : 32+/-15% Ohm;
3.Speaker dia : ￠40mm;
4.Mylar : 12?;
5.Frequency response : 130-20000Hz;
6.Input power : Nom40mw,Max100mw;
7.Distortion : Less than 3% at 1KHz 40mw;
8.Weight : Approx 205+/-3 grams;
9.connector : USB2.0;
10.Cord length :250 cm;
11.color:Gray & black.
12.Packing detail:
Out carton Means：54*32*39cm
inner carton means：30*25*35.5cm
QTY：60PCS
Net：12.0KG
Grow：16.0KG
One giftbox for a headset.
13. 5.1 SR.