Guide propaganda device, multifunction loudspeakers Horn products technology parameter frequency response degrees: 80Hz-15Khz output power: 8W speakers impedance: 4 ω work voltage: DC7.4-10V battery specifications: 1000mAh-2000Mah lithium battery superiority: normal using conditions Xia, life 3-4 years above; no memory effect, can in using process in the of any time for charging, built-in protection board, on filling had put for protection, guarantees battery security using Charger: AC90-264V wide voltage, global general type charger parameter: DC10V400MA charging time: about 6 hours using time: about 15 hours-20 hours standby time: about 120 hours (battery capacity, and volume size and environment temperature related) parameter wide * high * thick: 71.4mm*71.5mm*29mm (not contains hanging Board) hosts weight: 120g whole box Taiwan number: 20 PCS standard configuration hosts (built-in lithium battery) 1 Taiwan Only original charger comfort headset microphone 1 1 1 3.5-comfortable and durable belt stereo audio cable 1 set of application: teaching, guided tours, shopping, conferences, advocacy, visits, exercises and other amplifiers. Precautions: 1. do not use the headset microphone and loudspeakers in the same horizontal plane. 2. Please do not hold the microphone mic. 3. when the following problems occur, please charge follows: power indicator is not lit. II the microphone sound becomes small. ③ sound distortion.