Feature: 1. The arbitrary RGB lighting effect creates a dreamlike visual feast for you in the dark, making music more fashionable and trendy. 2. Multiple connection methods: Bluetooth-compatible, AUX cable, TF card, etc. can be freely switched, and the sound quality remains unchanged. Share music joy with friends anytime, anywhere. Description: Product Name: Bluetooth-compatible Speaker Features: card insertion, radio, voice prompt, call function Power supply mode: AC power Channel: 2.1 Frequency response range: 100HZ-20KHZ Waterproof grade: IPX 2 Shell process: ABS Type: Bluetooth-compatible speaker Product Number: M9 Bluetooth-compatible Audio Extended storage: not supported Power supply method: built-in lithium battery Bluetooth-compatible version: 5.0 Effective distance: 10 meters Internal battery capacity: 2000mAh -4000mAh Speaker adjustment method: buttons Number of speakers: 1 Interface type: USB Output power: below 10W Shell material: plastic Box material: glass Operation method: buttons Connection method: Bluetooth-compatible connection Signal to noise ratio: ≥ 75dB Maximum output power: 5W Product size: approximately D118 x H136mm Rated voltage DC 3.7V Bluetooth-compatible frequency 2.4GHz Charging voltage DV-5V 1A Charging time 3 ± 0.5 hours Audio playback time at medium volume for approximately 5 hours Packing list: 1 x Bluetooth-compatible Speaker Note: 1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.