2pcs Baofeng BF-888S 400-470MHz Two-way Radio Walkie Talkie 2800mAh Long Range

2800mAh Li-ion battery. 2 x 2800mAh Batteries. 2 x Walkie Talkies. Quantity: 2Pcs. How far can this radio be connected?. When and where do you need this radio?. Voice Prompt. - Communication Range: about 2-4km (depends on the actual situation).