Design with small size and modern fashion look.Built in boost circuit with adjustable sound reached 110-120db.
With rechargeable 280 mAh lithium battery,used more convenience .Contains USB cable,USB cable charge 1.2 hours full charge.1.2 hours fully charged can use for about 30-60 days，ringing about 4000 times and standby for 180 days.
Durable with full protection, IP65 level waterproof + Anti-dust + Shatter-resistant. Easy to Install & Remove , To install this electric bike horn,simply put the bike bell to the handlebar and use the silicon buckele to fasten it.
3 sound modes: whistle, siren, horn, suitable for different situations.
Control switch and bike horn are separated.You can install the bell to any position you like and ​install the control switch right next to your thumb, Which can keep you hand still on the bar when you press it.Very ergonomic design
Name:bicycle electric horn Color:Black Material:ABS+PC Weight:40 g DB:100-120 DB Charge input:5V-250 mAh Waterproof level:IP 65 Battery:280 mAh lithium rechargeable battery Charging Indication Before the first use,please full charge the electric bike bell. Open the USB waterproof plug then insert the charging line into the USB port. When the charge is complete,unplug the charging line and make sure the USB plug is covered. Please pay attention when charging the bike bell,the indicate light red is on charging ,full charged is green light.