Product Details explain: The upgraded Bluetooth compatible 5.0 chip and mini compact design make this product more stable, low power consumption, barrier-free and effective transmission distance of 10 meters, light weight, and convenient to carry, allowing you to enjoy beautiful music anytime and anywhere. Strong compatibility, suitable for Bluetooth compatible connection playback on mobile phones, tablets, and laptops, with no delay in calls, allowing you to easily answer every call while listening to music. This product is made of plastic and electronic components, making it more robust and durable. The length of the earphone is 7.5 centimeters, and the width of the earphone is 7.5 centimeters. The height of the earphone is 3 centimeters. It's suitable for cooking, parties, yard work, garages, bonfires, hiking, cycling, or the beach, no matter what you need it for. Product name: Bluetooth compatible speaker Material: plastic, electronic components Battery: built-in 900MAH battery (included) Charging time: 4 hours Output power: 3W Working voltage: DC 5V Playback time: 5-10 hours Bluetooth version: V5.0 Signal-to-noise ratio: greater than 70db Playback format: MP3, WMA Supported formats: TF card Resolution: greater than 90DB Dimensions: 7.5 cm x 7.5 cm x 3 cm/2.95 inches x 2.95 inches x 1.18 inches Notes: Due to differences in lighting and screen settings, the color of the item may differ slightly from the image. Due to differences in manual measurements, please allow for minor dimensional differences. The upgraded Bluetooth compatible 5.0 chip and mini compact design make this product more stable, low power consumption, barrier-free and effective transmission distance of 10 meters, light weight, and convenient to carry, allowing you to enjoy beautiful music anytime and anywhere. Strong compatibility, suitable for Bluetooth compatible connection playback on mobile phones, tablets, and laptops, with no delay in calls, allowing you to easily answer every call while listening to music. This product is made of plastic and electronic components, making it more robust and durable. The earphone is 7.5 cm long and 7.5 cm wide. The height of the earphone is 3 centimeters. It's suitable for cooking, parties, yard work, garages, bonfires, hiking, cycling, or the beach, no matter what you need it for. Item NO.124878747