Item Type: Wireless Bluetooth SpeakerMaterial: Plastic, ElectronicsBluetooth Version: 5.3Power Input: 5V1AFrequency Response: 80HZ-20KHZFM Radio Frequency: 87.5-108MHZMemory Card Slot: Maximum Support 512GB Memory Card (Not Included)Battery Type: Built in 1200mAh Lithium Battery (Included)Package List1 x Speaker1 x Charging Cable1MULTIPLE FUNCTION: Bluetooth stereo speaker features mirror clock display, dual alarms, real time temperature, voice announcement, FM radio. 2AUX MODE, MEMORY CARD MODE: bluetooth stereo speaker is available in AUX mode, memory card mode, more than just bluetooth connection, more options. 3HD NOISE COOLING MIC: Speaker has a built in noise canceling microphone, professional radio, clearer vocals, no delay in calls, free your hands during the call, easy to answer the phone. 4SUPERIOR SOUND: Clock speaker uses bass large diaphragm 50mm speakers, the combination of the two to create three dimensional shocking bass, enjoy the passionate sound wave. 5CUSTOMIZED DUAL ALARM CLOCK: The stereo speaker has a built in humanized alarm clock function, you can set two alarm clocks to enjoy different fun every morning.