Only the same model, the same model is compatible, other brands/models are not compatible[Long-distance communication] The walkie-talkie can reach a distance of up to 3 miles in an open area without shelter (such as rural, suburban or seaside areas). Whether in cities or towns, the walkie-talkie can transmit 0.6 to 1.2 miles in most cases. The actual distance depends on the obstacles in the current environment.[Durable battery] Each walkie-talkie provides a 1500mAh high-capacity rechargeable lithium-ion battery. Under normal circumstances, the walkie-talkie can be used for 8-96 hours when fully charged, and can be used continuously for 8-12 hours. The actual time depends on the frequency of use; 0 capacity battery is fully charged in 3-4 hours, and the battery life is long.[Easy to use] The walkie-talkie is suitable for people of all ages. Just tune the two radios to the same channel and press the call button to talk to each other. The automatic sending and receiving sound function makes it more convenient to talk hands-free anytime, anywhere. The walkie-talkie comes with an LED light, which can be of great help in the dark night.[Clear and stable communication] High-quality speakers and microphones provide loud and clear sound. Each walkie-talkie comes with a headset and a belt clip, so you can speak directly through the headset microphone without using your hands.Wide ApplicationSmall housing, lightweight, durable, drop-proof and splash-proof. This portable two-way radio transmitter is suitable for survival camping, cycling, hiking, construction areas, etc. It is more stable than your mobile phone in some cases, especially in remote areas or areas with poor signal reception. If you have any questions about your purchase, please feel free to contact us.