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| Thumb | Product Name · Profile | Company Name |
| Piezo Ceramics Transmitter/Receiver
PR21N-L100A1-BH Frequency Range0.3 ~ 3.4 kHzSound Pressure Level(IEC-318 Coupler is used and the Earpiece is special for Sunlight 1600)106±3... | GCI Electro-Ceramics Company |
| LOUDSPEAKER YD2708H9
Type YD2708H9Impedance (at 1 KHz) 8Ω±20% Rated Power 0.25wMax.Power 0.5wF0 Resonance Frequency 700Hz±20%Frequency Range F0 --3500HzOutput S.... | Huasheng Electronics CO.,LTD |
| RECEIVER SD33.5150H12
Type SD33.5150H12Impedance （at 1KHz）150Ω±20%Sensitivity （318ear/60mv ） ≥93dBFrequency Range300-3400Hz... | Huasheng Electronics CO.,LTD |
| Microphone CM9785P
Electronic Specifications: Sensitivity-47±3dB(0dB=1V/Pa,1KHz)Impedance680Ω-30%DirectivityUnidirectionalFrequency10... | Changzhou Wujin Lianhua Electronics Co., Ltd. |
| Microphone CM6022L
Electronic Specifications: SensitivitySee above(0dB=1V/Pa,1KHz)Impedance2.2kΩ-30%DirectivityUnidirectionalDifferen... | Changzhou Wujin Lianhua Electronics Co., Ltd. |
| Receiver LSDR1532-C-02
Type LSDR1532-C-02Impedance32±10%Ω at 1KHzSensitivity116±3dB at 179mV/1KHz IEC318Frequency Response300～3400HzRated input10mWMax.input30mWOpe... | Changzhou Wujin Lianhua Electronics Co., Ltd. |
| Receiver LSDR1032-W-01
Electronic Specifications: TypeLSDR1032-W-01Impedance32±10%Ω at 1KHzSensitivity117±3dB at 179mV/1KHz IEC318Frequen... | Changzhou Wujin Lianhua Electronics Co., Ltd. |
| Receiver SD158LH
dia.: 31Height: 12.3Input: 60Impedance: 150dB: 93Standard: Impedance:150Ω+-20% at 1KHzInput:60mVSensitivity:93dB+-3dB at 1KHz/60mVH.A.C.:Axi... | Shenzhen Linjia Electroacoustic Co., Ltd. |
| Receiver MR1307
dia.: 13Height: 2.6Input: 100Impedance: 32dB: 99Standard: Impedance:32Ω+-20% at 1KHzInput:100mVSensitivity:99dB+-3dB at 1KHz/100mVContact ty... | Shenzhen Linjia Electroacoustic Co., Ltd. |
| Receiver SD0315
dia.: 13Height: 2.7Input: 100Impedance: 32dB: 111Standard: Impedance:32Ω+-20% at 1KHzInput:100mVSensitivity:111dB+-3dB at 1KHz/100mVContact ... | Shenzhen Linjia Electroacoustic Co., Ltd. |
| Receiver MR1504
dia.: 15Height: 3.0Input: 100Impedance: 32dB: 102Standard: Impedance:32Ω+-20% at 1KHzInput:100mVSensitivity:102dB+-3dB at 1KHz/100mVContact ... | Shenzhen Linjia Electroacoustic Co., Ltd. |
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