Cover Industrial Co., Ltd. Block 12, 3/F, DongFang JianFu, YuSheng Industrial zone GuShu Village, XiXiang Town, BaoAn District , Shenzhen Guangdong Province, China 518126 Attn: Alex Xiao, Tel: 86-755-29173471, Fax: 86-755-29174502 Http://www.cover-cn.com Parameters: 1 Type Dynamic speaker 2 Dimension External diameter 40 mm 3 Rated Input Power 0.25 W 4 Impedance 8 ohm 15% at 1500Hz 5 Resonance 440 Hz 20% at Fo, 1V Frequency (Fo) 6 Sensitivity (S.P.L.) 85dB(W/m) 3 dB at AVE 0.6K,0.8K,1.0K,1.2K(Hz). 96dB(0.25W/0.1m) 3 dB 7 Frequency Range Fo 20KHz 8 Distortion Less than 10 % at 1500Hz 0.25W 9 Max. Input Power Must be normal at 0.4W white noise for 1 minute. 10 Voice Coil Diameter 10.8 mm 11 Magnet Rare earth permanent (Nd-Fe-B) magnet 10 x 1.5mm 12 Weight 11g 2g 13 Appearance Should not exist any obstacle to be harmful to normal operation damages, cracks, rusts and distortions, etc. 14 Operation Test Must be normal at program source 0.25W 15 Buzz, Rattle, etc. Should not be audible at 1.41V sine Wave between Fo to 20KHz 16 Polarity When positive voltage is applied to the terminal marked (+), diaphragm should move to the front. 17 Terminal Strength Capable of withstand 1kg load for 30 seconds without resulting in any damage or rejection. 18 Load Test 0.2 W white noise is applied for 96 hours and satisfy the test listed on item 05,06,13,15 19 High Temp. Test Keep 96 hours at +703 and leave 3 hours in normal temperature and then check 20 Low Temp. Test Keep 96 hours at -203 and leave 3 hours in normal temperature and then check 21 Humidity Test Keep 96 hours at + 603 relative humidity 95% and leave 3 hours in normal temperature and then checked.X-ON Electronics Largest Supplier of Electrical and Electronic Components Click to view similar products for Adafruit Accessories category: Click to view products by Adafruit manufacturer: Other Similar products are found below : 3209 3561 3560 3562 2503 3011 3048 2973 2868 2958 2836 2968 3610 3568 3551 2858 3353 3584 3484 2865 3556 3559 3262 3348 2499 2878 2963 3219 3005 2882 PGM1202 02-LDR1 02-LDR12 02-LDR13 02-LDR14 02-LDR15 02-LDR2 02-LDR3 02-LDR4 2194 862 460 905 02-LDR20 02-LDR21 02-LDR22 02-LDR23 1008 1020 1031