2, to be waterproof, drop-proof this is very important to play in the outdoors will inevitably rain, fall and touch, waterproof level to see their standard IPX level 1-10 the higher the more powerful, whether there is a certificate of authentication.
3, volume size, here we should pay attention to the purchase of skills, here to share some experience, outdoor, don't choose which a speaker compact which, we all thought that small and easy to carry portable, but I do not know that it is a chicken ribs, outdoor open noise which small speakers are useless sound and small are all noise, no enjoyment can be said, and the range and short. So when you buy and then the volume can be accepted under the circumstances try to choose two speakers with bass vibration disk speakers, the sound of the sound quality is good.
4, say a problem we do not pay much attention to, is the bluetooth chip, this is also very important just most people do not understand did not pay attention to the chip is related to the stability of the product's performance, the sound quality of the good and bad, so far CSR's chip is better, pay attention to the bluetooth and try not to buy that kind of function of the speaker, because that kind of multi-functional chip is very bad, it is very easy to get into trouble.
5, is the portability and versatility, a speaker is best to meet the portability, a number of different environments, such as: climbing mountains can be used, camping on the beach, bicycling, walking, home use, etc. are available that would be perfect.