Features: When the bike security alarm is activated, it is sensitive to any vibrations, helping protect your bicycle from theft. The alarm sound can reach up to 115 dB, loud enough to alert nearby individuals. Press the button on the remote controller to locate your bike quickly, with a remote range of up to 80 meters. Offers 5 selectable sound modes, 3 levels of vibration sensitivity adjustment, and 3 levels of volume adjustment. Built-in 400mAh rechargeable battery, conveniently recharged using the included USB cable. The alarm bell features IPX5 waterproof rating, providing reliable performance in rainy conditions. Includes mounting brackets and tie straps for easy installation on various bike frames. Suitable for use on mountain bikes, motorcycles, scooters, strollers, children's bikes, and more. Specification: Material: PC + ABS Package size: 150 x 105 x 46 mm / 5.9 x 3.9 x 1.8 in Package weight: approx. 130.2 g / 4.6 oz Alarm Bell: Sound output: 115 dB Waterproof rating: IPX5 Battery: 1 x built-in 3.7V 400mAh lithium battery (included) Size: 43 x 31 x 46 mm / 1.7 x 1.2 x 1.8 in Weight: approx. 63.1 g / 2.2 oz Remote Controller: Waterproof rating: IPX6 Battery: 1 x 12V/27A alkaline battery (included) Operating range: 0 - 80 meters Size: 58 x 35 x 15 mm / 2.3 x 1.4 x 0.6 in Package List: 1 x Alarm Horn 1 x Horn Bracket 1 x Fixed Screw (for Horn Bracket) 1 x Remote Controller 1 x Remote Controller Bracket 1 x Silicone Pad (for Remote Controller Bracket) 4 x Tie Straps 1 x USB Charging Cable 1 x User Manual