The speaker bicycle light utilizes a XPG LED source, 250 lumens with three profiles dimming technology (High light-Low light-Flashing). Super bright headlight that satisfy your riding needs and keep you safe. 250 lumen bicycle front light, ensure safety riding at dark night. The speaker bicycle light with 140 dB horn. A independent switch. It has 5 different kinds of sounds. You can long press the speaker switch for 5 seconds to change the sounds, when you listen to the sound what you wanna, you loose your finger, that it is successful for your set up. 140db bicycle horn is super loud to attract passer-by and vehicles The speaker bicycle light has built-in 1200mAh lithium polymer battery. It is rechargeable and with a USB cable. You can charge from your computer or any device with a USB port. It only takes 3 hours for full charge.The indicator lamp will be on Red when charging and will be Green when the power is full. Easy and hassle-free installation.