This radio is helpful for the following circumstances:security guard、 supermarket connection、 constructionarea indication.It is also helpful for field survival、 biking and hiking.It is very easy to use these.All you need is turn these two to the same channel (16channnel to be chosen)、 push a button、 and you can hear from your mate. Features: Scramblernoise reduction circuitlong standby timelong communication rangehigh capability li-ion batterybattery save. CTCSS. DCSreporting number command of english and chinese function humanism design.Specification:Model: BF-888SAntenna Impedance: 50ohmWorking temperature: -30~+60¡ãCRated Voltage: 3.7V DCOutput power: <5WBattery type: Li-ion batteryBattery capacity: 1500mAhItem size: 55 x 33 x 115 mm (L x W x H)Antenna length: 110 mmNet weight: 200gDual band or Single band: Single bandDual frequency or Single frequency: Single frequencyPackage:1 x pofung BF-888S1 x 3.7v 1500mAh Li-ion Battery1 x SMA-Female Antenna.1 x Belt Clip.1 x ENG Manual1 x Desktop Charger (100V /240V )1 x Wrist Strap1 x fee earpiece