It has a variable blink sequence for manual mode and a full-time pulse mode for use with detector to maintain full brightness and visibility. The locking pendulum helps to prevent damage to internal components and there is an integrated magnetic pivoting base with a 1/4in thread. The wear resistant, overmold is rated to IP65, against projected water & dust damage. It has also been drop tested to 2m. DCE088D1G: 1 x 10.8 Volt 2.0Ah Li-Ion Battery.DEW088NR: No Battery or Charger. Specification Laser Class: 2, Level Accuracy: ±3mm@10m.Self-Levelling Range: 4°.Visibility Outdoor/Indoor: DCE088D1G: 30m (60m w/detector), DEW088NR: 15m (50m w/detector).Thread: 1/4in.Weight: 2kg.