Bluetooth Speaker Portable Wireless Bluetooth 5.0 Solar Speaker with LED Flashlight and FM Radio Item Type: Wireless Bluetooth Speaker Material: ABS Bluetooth Version: 5.0 Bluetooth Protocol: A2DP, HSP, HFP, AVRCP Signal Transmission Distance: Approx. 10m/32.8ft Signal to Noise Ratio: ≥90dB Distortion Rate: <1% Speaker Specifications: 2 x 4Ω/3w ∅50mm Frequency Response Range: 100Hz~18KHz Working Time: 3h Battery Specification: Lithium Battery 18650 3.7V/1200mAh (Built-In) Charging Interface: Micro Micro Charging Specifications: DC 5V---0.5A Solar Charging Specification: DC 5V---150mA Audio Input: USB, Memory Card, AUX1. Bluetooth Function Using advanced Bluetooth audio decoding chip, it supports all Bluetooth devices to turn on the device, turn on the power switch to enter the Bluetooth mode, the blue light flashes, turn on the phone or tablet to search for "AK-3317" and click to connect. The voice prompts that the pairing is successful, and the blue light flashes slowly. The Bluetooth receiving distance can be as long as 10 meters. 2. Bluetooth couplet function Turn on the two machines, enter the Bluetooth mode, long press M on either machine, the couplet will be prompted, the voice will remind you that the couplet is successful, and the blue light will stay on. Connect with a mobile phone or tablet, and the operation is the same as step "1". 3. Hands-free call The device is successfully paired with the mobile phone, short press the play button twice to dial the last call number. Short press the play button to answer or hang up the call, long press the play button to reject the incoming call: Note: When playing music, the call ends and the speaker automatically restarts the music. 4. FM radio function Short press the M button to enter the FM mode, short press the play button to automatically search for radio stations, and automatically store the stations after searching. Short press the + and-buttons to enter the previous or other channel. When searching for a station, short press the play button to exit. 5. USB/Memory Card function Read U disk and Memory Card directly 6. AUX function Support AUX audio input, provide you with computer speaker function. It can be directly connected to mobile phone / tablet / and TV Bluetooth pairing to play music. 7. LED flashlight function Turn on the power switch of the Bluetooth speaker, short press the light button to turn on the LED flashlight, the LED is bright, press the second time the LED is low, press the third time the LED flashes, press the fourth time the LED is off, and so on