Model: GF-836APro. Spc.:19*12.5*3cmFunction explanationInput sensitivity:500mV OutputPower:2W*2 8(OHM) 10% TDHSpeaker:1.25inch*4,4(OHM) 3WFunction: Vol+ Vol- Control, Power,SwitchAA Size Battery(not i

Model: GF-836BPro.Spc.: 19*12.5*3cmFunction explanationInput sensitivity:500mV OutputPower:2W*2 8(OHM) 10% TDHSpeaker:1.25inch*4,4(OHM) 3WFunction: Vol+ Vol- Control, Power,SwitchAA Size Battery (not

Model: GF-839Pro.Spc.: 16.8*11*6.7cmFunction explanationOutput Power:2W*2N.W.kg: 13kgCtn./Size(cm): 40*43*26Qty/Ctn(pcs): 20pcsRemark: USB line

Model: GF-854APro. Spc.:15.5*15.5*6.5cmFunction explanationPower supply DC 6 Volt( AAA batteries * 4 )Or AC adaptor output power =2+2W/channel, @8 OHM @10% THD speaker 34mm speaker,4ohms signal cable

Model: GF-858CPro.Spc.: 18*12*30cmFunction explanationInput sensitivity:500mV OutputPower:2W*2 8(OHM) 10% TDHSpeaker:52*2,4(OHM) 3WFunction: Vol+ Vol- Control, Power,SwitchAA Size Battery (not include

Model: GF-858DPro.Spc.: 18*12*30cmFunction explanationInput sensitivity:500mV OutputPower:2W*2 8(OHM)Speaker:50*2,4(OHM) 3WFunction: Vol+ Vol- Control, Power,SwitchAA Size Battery (not included) Syste

Model: GF-896Function explanationFrequency : 83.3-108.0MHZDivision : 23dbImpedance : 32Maximum Power:0.5WPower Supply : 3VOperating Current : 30MAModulation: FMwith wireless speakerN.W.kg: 12kg/ctnCtn

Model: GF-9188CPro. Spc.:30.3*12.5*20cmFunction explanationFrequency: FM 88-108MHzPower consume:15W Distortion:0.7%Frequency sound:90Hz-250Hz FidelityRate:2.25W*2+6WN. W. Kg:15kgCtn. Size(cm):50.5*28.

Model: Gf-809Function explanationPower supply: USB lineSpeaker unit:40mmx2wOutput power:2w*2(1khz 10% thd)N. W. Kg:18kg/ctnCtn. Size(cm):66.5*43*49.5Qty/ctn(pcs):60pcsRemark: USB line/audio-line