Instructions for single speaker Long press the power button to turn on, until you hear the beep "Bluetooth Mode"In the setting menu of the mobile phone or mobile terminal, turn on the Bluetooth switch.Click Scan and find "Humbird Speaker"Once the connection is successful, the voice prompt "Connected successfully" Instructions for stereo pairing of two speakers Press the power button to turn on the two speakers at the same time;After 5-8 seconds, the two speakers are automatically paired successfully, and the voice prompts "left channel", "right channel" Tips FM radio instructions In Bluetooth mode, short press--down the power button to switch to FM radio mode, the prompt sound "radio mode";Press the function key for 3 seconds to start automatic FM search.After the station search is completed, the speaker will automatically store the stations that have been searched.VVolume control: single-click the button-volume decrease, double-click the button-volume increase, three-click the button-switch radio stations.(*Before starting radio, the USB cable must be inserted into the charging port of the speaker as an FM radio antenna, which is better for outdoor use.) WHAT´S IN THE BOX? 1. Speaker / (s) 2. Type-c charging cable 3. Lanyard 4. Silicone suction cup 5. Instructions Colors: Silver , Black , Red Materials: Aluminum ,Plastic — Bluetooth 5.0 Wireless Connection — TWS Compatible: Pair Up To 2 Speakers — Frequency Range: 120 hz ~ 16 kHz — Maximum Sound Volume: About 110dB — USB Rechargeable 400mAh Polymer Li-on Battery — Play Time: Up To 4 Hours Per Charge — NOT Waterproof or Water Resistant — Measurements 1.5"L x 1.5"W x 0.9"H — Weight: 1.23 oz The speaker is equipped with an original TypeC charging cable. Get 80% of power in 15 minGet full charge in 30 minutesHigh voltage and capacity battery in 400 mah for 3 hours working time